mosteiro da serra do pilar and bridge dom luis i over douro river, porto, portugal. 17 may 2017

above aerial agostinho ancient architecture atlantic attraction boat bridge bridgeinporto bridgeporto building cathedral centre church city cityscape coast colorful day daytime dom domluis douro downtown drone duero duoro duororiver europe european famous gaia heritage historic historical history landmark medieval monastery mosteiro night nova old oporto pilar port porto portoaerialview portoarchitecture portobridge portobuilding portobuildings portocity portoduoro portolandmark portoplaces portoportugal portoribeira portoriver portoview portugal portugallandmark portuguese ribeira river riverinporto serra skyline sunny top tourism town travel unesco view vila