The unbelievably opulent home built for an infamous newspaperman.

One of the oldest reform schools in the United States, home to wayward boys such as Merle Haggard, now abandoned.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

This naturally heated mountainous creek has created a group of neon blue pools of potentially deadly boiling water.

California's own medieval Italian castle, authentic down to the 300-year-old iron maiden in the dungeon.

This massive redwood tree has a hole in the base big enough to drive through.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

Big gun installations, built over a massive cemetery, now abandoned & hidden in trees.

Furniture tries to escape an abandoned building in San Francisco.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

Standing in a state of "arrested decay," this ghost town allows for a detailed peek into Gold Rush life in an unusually harsh climate.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

An essential stop before plundering, BYO Cutlass.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

A nondescript building that's been functioning as a speakeasy for nearly a century and a half.

A shop full of natural curiosities, carnivorous plants, and costumed taxidermied mice.

The second oldest continuously operating bar in Louisiana.

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

Tiki luxury on Nob Hill.