Catacombs of Milos
These catacombs date from the first to the fifth centuries and are said the be the second oldest in the world (after the ones in Rome). The subterranean caves were used by the earliest Christians as a burial site, and although much of the decoration has been eroded over time, exploring the tunnels makes for a fascinating peek into ancient history.
This is not the beach for those afraid of heights or for those who want easy accessibility. Getting here requires shimmying down a rope on a sloping face of a cliff. The reward for this brief bit of terror is a beach that’s often peaceful and empty, with crystal-clear water to frolic in all day. If cresting the cliff sounds too intense, you can always rent a boat and forget the rope part altogether.
You have to see it to fully understand the wonder that is Sarakiniko beach. In lieu of sand, you’ll find rock formations that look like smooth slopes of cooled white volcanic ash set against the unbelievable blue of the Aegean. There are countless little coves and caves all along this stretch that make for perfect diving and snorkeling. Look for the food truck parked at the edge of the beach, which means you don’t have to leave for lunch.