A prehistoric landscape hidden in the cliffs of Maha'ulepu.

This narrow coastline trail through the dense Kauai wilderness is among the most beautiful and dangerous in the world.

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.

One of the oldest surviving bars in the United States, located at the site of the last skirmish of the American Revolution.

The Grand Canyon’s original airport, which once welcomed pilots like Amelia Earhart and Charles Lindbergh, lies abandoned.

The remnants of a creative early method of wildfire prevention.

This Native American settlement dates back to the Pueblo II period.

This former luxury resort in Kaua'i is now an abandoned relic.

A Saint Nicholas-themed ghost town in the Mojave desert.

In this German city center, the streets have no names.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

These magnificent 240-year-old machines are considered distant ancestors of the computer.

For more than half a millennia, this automaton has rung an hourly bell.

A pair of club-wielding guardians stand watch over London's first public clock to feature a minute hand.

Stuck in a bygone era, the oldest subterranean shopping street in Japan hides beneath the popular Asakusa district of Tokyo.

Swim or sail to this pie-slinging boat off the coast of St. Thomas.

“Live hard, ride fast, eat pizza” at this joint filled with Evel Knievel memorabilia.

Come for the pizza, stay for a performance on the world's largest theater pipe organ.

Seriously good slices of Sicilian pizza lurk at the back of the Bronx's oldest enclosed market.

Now a pedestrian bridge, this was once part of a narrow-gauge railroad that ran along the east coast of Kauai.

A local pineapple cannery once dumped pineapple trimmings off of this pier, with sometimes smelly results.

This monument built by Japanese American immigrants spent decades underground.

A Japanese pilot crash-landed on this Hawaiian island after the Pearl Harbor attack and terrorized locals for a week.

After the comedian dissed a Connecticut town on his show, they named a sewage treatment plant after him.