3 Best Sights in The Saronic Gulf Islands, Greece

After Marathonas, Aeginitissa is a small, sandy bay with crystalline green waters surrounded by huge eucalyptus trees. The shallow water makes it accessible to novice swimmers. There's a bar, a beach volleyball court, and umbrellas and lounge chairs are available for rent. Amenities: food and drink; showers; water sports. Best for: sunset; swimming.

The best sandy beach on the island, Ayia Marina is popular with the parenting set, as the shallow water is ideal for playing children. A more rocky beach lies to the north of the marina that is good for diving and snorkeling. There are plenty of tavernas and cafés along the bay, while Hotel Apollo is not too far away. Amenities: food and drink; lifeguards; toilets; water sports. Best for: snorkeling; swimming; walking.

Internationally renowned modern art collector Dakis Joannou acquired this former Hydra slaughterhouse, a leisurely 10-minute walk from the town (toward Mandraki), in 2009 to host artistic events and projects organized by his budding DESTE Foundation. Surprisingly, this is not what one might expect a chic and modern art gallery to look like: housed in an unassuming small building on a cliff by the sea, it can be missed if you don't actively look for it. But perhaps that is exactly the point that Joannou wanted to make with the Slaughterhouse, which has already acquired a leading role in Hydra's cultural life. Starting with the 2009 multimedia project "Blood of Two" by Matthew Barney and Elizabeth Peyton (which paid homage to the space's morbid past), every summer the space is now assigned to a different artist who is invited to stage a site-specific exhibition. Since then Doug Aitken, Urs Fischer, Paul Chan, Pawel Althamer, and Kara Walker, among others, have had works and installations exhibited there.