abandoned termas rádium (hotel serra da pena) ruins in sortelha, portugal.

landmark tourism ruins town waterway fortification building monastery castle bridge palace architecture estate river arch vacation abandoned termas raiexcl dium hotel serra pena sortelha portugal historic stone structure nestled rugged landscape symbolizes architectural decay forgotten heritage places adventure ancient history cultural deserted european exploration site hidden gems historical old portuguese remote location ruin rural rustic sightseeing travel destination