majestic underground palombaro lungo, matera, italy

waterway water wall unesco underground undefined tunnel travel transport tourism system symmetry sunlight subway subterranean structures stone site sightseeing screenshot sassi ruins rockhewn reservoir reflection palombaro old night mustvisit mediterranean medieval matera lungo light landscapes landmarks landmark italy italian infrastructure history historic hidden heritage green gem formation famous european engineering dwellings destination darkness culture cultural city cistern caves cavernous cave bridge basilicata architecture arches archaeology arch ancient alley yellow wood temple painting lighting blue art