The world's largest statue of Mao Zedong looks out over the city where he discovered Communism.

The world's longest outdoor covered escalator system transports commuters through Hong Kong's hilly terrain.

Teeming with illegal goods and services, this towering maze of vice is also a popular tourist accommodation.

A free, canine-friendly alternative watering hole near the more famous Barton Springs.

Home to an endangered salamander, a full moon celebration, and a large spring-fed outdoor swimming pool.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

One part antique store, one part curiosities hodge-podge.

This unique structure in suburban Austin is made up entirely of other people's castaways, and constantly changing.

A grove of colossal man-made flowers built to collect the sun's rays.

Controversially claiming the title of world's biggest bass drum, UT's Big Bertha was once made radioactive by the Manhattan Project.

This simple frog painting created by musician Daniel Johnston embodies the spirit of Austin.

This failed condo development was reborn as a street art hub.

Turning night into day in Victorian-era Austin to thwart a serial killer.

Continuing the tradition of the dime museum in style.

Locals dubbed it the "Owl Building" because of its bird-like appearance.

In a 345-million-year-old cave that's 200 feet underground, dinner awaits.

This giant steer-skull edifice refuses to die.

See massive fossils that are over 200 million years old in northeastern Arizona.

The wreckage of a deadly bomber plane crash can still be found near an Arizona peak.

The story of Two Guns, Arizona could easily be described as a Shakespearian tragedy on Route 66.

A pair of giant roadside arrows are all that remains of a former Route 66 trading post.

A reproduction of earth's many biomes.

A spiritual vortex among the red rocks in Sedona.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.