Lazaros Koundouriotis House

You'll spot this commanding mansion dominating the western slope above Hydra's town center - it's the historic home of Lazaros Koundouriotis, now operating as a museum annex of the National Historical Museum since 2001. Built by Italian craftsmen, the house features beautiful wooden ceilings throughout and offers striking views over the harbor. What makes it special isn't lavish decoration, but rather its authentic preservation of 19th-century island architecture and its role in Greek maritime history.