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    <element id="PW_PittsburghWestVirginiaRailroadMember" name="PittsburghWestVirginiaRailroadMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_REITSecuritiesMember" name="REITSecuritiesMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_TwoMainePropertiesMember" name="TwoMainePropertiesMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_PWPWVLoanMember" name="PWPWVLoanMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_TwoThousandFifteenPWRSLoanMember" name="TwoThousandFifteenPWRSLoanMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_GreenHouseLoanMember" name="GreenHouseLoanMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_NorfolkSouthernRailwayMember" name="NorfolkSouthernRailwayMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_RegulusSolarLLCMember" name="RegulusSolarLLCMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_SolarFarmLeaseMember" name="SolarFarmLeaseMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_GreenhouseCannabisMember" name="GreenhouseCannabisMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_AssetHeldForUseMember" name="AssetHeldForUseMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_PWPWVLoanAgreementMember" name="PWPWVLoanAgreementMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_DebtFacilityMember" name="DebtFacilityMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_AssetsHeldForSaleMember" name="AssetsHeldForSaleMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_SalesAgreementMember" name="SalesAgreementMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="PW_CultivationAndProcessingFacilitiesNetOfAccumulatedDepreciation" name="CultivationAndProcessingFacilitiesNetOfAccumulatedDepreciation" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="PW_MortgageLoanReceivables" name="MortgageLoanReceivables" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="PW_RentalIncome" name="RentalIncome" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="PW_MarketableSecuritiesUnrealizedLoss" name="MarketableSecuritiesUnrealizedLoss" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="PW_IncreaseDecreaseInDeferredRentReceivable" name="IncreaseDecreaseInDeferredRentReceivable" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="PW_AccruedInterestTransferredToLoan" name="AccruedInterestTransferredToLoan" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="PW_TransferOfPreviouslyPaidS3ExpenseFromOtherAssetsToApic" name="TransferOfPreviouslyPaidS3ExpenseFromOtherAssetsToApic" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="PW_DisclosureDirectFinancingLeasesAndOperatingLeasesAbstract" name="DisclosureDirectFinancingLeasesAndOperatingLeasesAbstract" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="PW_AssetsHeldForSalePolicyTextBlock" name="AssetsHeldForSalePolicyTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="PW_NetInvestmentInDirectFinancingLeaseRailroadPolicyTextBlock" name="NetInvestmentInDirectFinancingLeaseRailroadPolicyTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="PW_OtherIncomePolicyTextBlock" name="OtherIncomePolicyTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="PW_OtherAssetsPolicyTextBlock" name="OtherAssetsPolicyTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="PW_InterestExpenseIncludingLoanModificationExpensesPolicyTextBlock" name="InterestExpenseIncludingLoanModificationExpensesPolicyTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="PW_ImpactOfNewAccountingStandardsPolicyTextBlock" name="ImpactOfNewAccountingStandardsPolicyTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="PW_ScheduleOfBreakdownOfRentalIncomeRecognitionTableTextBlock" name="ScheduleOfBreakdownOfRentalIncomeRecognitionTableTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="PW_ScheduleOfDirectFinancingLeaseAndOperatingLeaseTableTextBlock" name="ScheduleOfDirectFinancingLeaseAndOperatingLeaseTableTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="PW_AssetsAndLiabilitiesOfAssetsHeldForSaleTableTextBlock" name="AssetsAndLiabilitiesOfAssetsHeldForSaleTableTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="PW_WroteOffAccruedPropertyTax" name="WroteOffAccruedPropertyTax" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="PW_LossOnAccruedPropertyTax" name="LossOnAccruedPropertyTax" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="PW_MinimumPercentageOfTaxableIncomeToBeDistributedToShareholders" name="MinimumPercentageOfTaxableIncomeToBeDistributedToShareholders" nillable="true" xbrli:periodType="duration" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
    <element id="PW_CashBasisRent" name="CashBasisRent" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="PW_AccountingPoliciesTable" name="AccountingPoliciesTable" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" />
    <element id="PW_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFour" name="FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="PW_DeferredRentReceivablesIncludingOfHeldForSaleAmount" name="DeferredRentReceivablesIncludingOfHeldForSaleAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="PW_RealEstateInvestment" name="RealEstateInvestment" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="PW_MortgageLoansOnRealEstateDefaultInterestRate" name="MortgageLoansOnRealEstateDefaultInterestRate" nillable="true" xbrli:periodType="duration" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
    <element id="PW_AmortizationTerm" name="AmortizationTerm" nillable="true" xbrli:periodType="duration" type="xbrli:durationItemType" substitutionGroup="xbrli:item" />
    <element id="PW_PropertyExpensesAndTaxes" name="PropertyExpensesAndTaxes" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="PW_DispositionsOfPropertyAmortizedPeriod" name="DispositionsOfPropertyAmortizedPeriod" nillable="true" xbrli:periodType="duration" type="xbrli:durationItemType" substitutionGroup="xbrli:item" />
    <element id="PW_DirectFinancingLeasesAndOperatingLeasesAbstract" name="DirectFinancingLeasesAndOperatingLeasesAbstract" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="PW_DirectFinancingLeasesAndOperatingLeasesTable" name="DirectFinancingLeasesAndOperatingLeasesTable" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" />
    <element id="PW_ConcentrationRiskThresholdPercentage" name="ConcentrationRiskThresholdPercentage" nillable="true" xbrli:periodType="duration" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
    <element id="PW_OperatingLeasesIncomeAbstract" name="OperatingLeasesIncomeAbstract" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="PW_OperatingLeasesIncomeTable" name="OperatingLeasesIncomeTable" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" />
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    <element id="PW_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFour" name="LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
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    <element id="PW_GreenhouseCultivationAndProcessingFacilitiesNetOfAccumulatedDepreciationAssetsHeldForSale" name="GreenhouseCultivationAndProcessingFacilitiesNetOfAccumulatedDepreciationAssetsHeldForSale" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="PW_AccountsPayableHeldForSale" name="AccountsPayableHeldForSale" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="PW_AccruedExpensesHeldForSale" name="AccruedExpensesHeldForSale" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="PW_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsEstimateOfForfeitureRate" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsEstimateOfForfeitureRate" nillable="true" xbrli:periodType="duration" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
    <element id="PW_ForfeitureRate" name="ForfeitureRate" nillable="true" xbrli:periodType="duration" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
</schema>
