Austin’s local mountain isn’t really a mountain at all.

Craggy concrete faces are hidden in the walls of this artificial cave along the San Antonio River.

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

An ivy-covered arch bridge dedicated to Tejano music singer and legend Rosita Fernandez.

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

An enormous pink granite batholith, long attributed with spiritual powers by the Tonkawa Indians.

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.

Continuing the tradition of the dime museum in style.

An emerald-green grotto just a short trip from Austin.

Post office plaque commemorates local resistance to a cult invasion.

The world's last remaining store of its kind.

A wall of chewing gum moonlights as collective art.

A museum dedicated to the history and exploration of both popular music and science fiction.

A giant Troll lurks under one of Seattle's oldest bridges.

A popular European tradition makes its way to the states on one of America's most famous bridges.

A semi-scholarly approach to sex.

Elevated freight railway turned wildly successful urban park.

Odd outsider art installations surround a Gold Rush-era ghost town.

Twelve plaster figures inspired by da Vinci's famed painting haunt the desert landscape above a real-life ghost town.

The world-record holder for the longest bridge stretching continuously over water.

A prime example of New Orleans' unique architecture these early 20th century homes were built to look like steamboats.

A theme park that suffered massive flooding during Katrina was abandoned, and now proves irresistible to trespassing explorers.

Here, visitors can swing with the waves of the Pacific Ocean.