OFF THE BEATEN PATH

Three more lost cities to discover.

CHOQUEQUIRAO

Often called “the other Machu Picchu,” this 15th-century Peruvian citadel, which is spread across 1,800 hectares, is just as striking as its nearby sister city—but much less touristy since it requires a four-day hike to reach it.

SHI CHENG

You’ll need scuba gear to explore the 265 stone arches of this 12th-century “Lion City” near Shanghai because they’re underwater in Thousand Island Lake, which was formed by a hydro dam in 1959.

ATLANTIS

Is this famed underwater city really lost or is it the ultimate mythical hoax concocted in ancient Greece by Plato? Writer Mark Adams sets out on a global journey to find out in his new book, Meet Me in Atlantis.