1. Cancun's Underwater Museum, Mexico
The world’s largest underwater museum opened three miles offshore in November 2010 with hundreds of sunken life-size human figures. Artist Jason deCaires Taylor used pH-neutral concrete to create these sculptures, which double as a home for peacock flounder, white telestra coral, and other aquatic life that have becoming increasingly threatened by the 750,000-plus annual divers who visit the National Marine Park’s coral reefs.
2. Capital Gate, Abu Dhabi
Dubai typically hogs the limelight with its ambitious projects, but now Abu Dhabi is defying gravity with this glassy 35-story landmark—the world’s furthest-leaning man-made tower. The glinting 18-degree tilt (four times more than that of Pisa’s leaning tower) catches your eye among the city’s jumble of skyscrapers and cranes. You can’t miss it on the drive to the Grand Mosque, but to get a peek inside, book a stay at the Hyatt Hotel slated to open in mid-to-late 2011.