Sunset-colored dunes of volcanic ash make taking a poor photo impossible.

Trails through lava-carved tube-caves display sparkling bacteria and a rich history.

The flow from this waterfall sometimes comes out of springs below its rim.

Centuries of crashing waves carved out this small hole in the rock, which lights up at certain parts of the year.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

An emporium for the weird, creepy, rare, and just plain gross.

Banksy gives themself artistic license with this piece of London street art.

A hands-on traveling collection of the innovative devices of yesteryear.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

Here, at the "world's longest art gallery," you'll find forty miles of ancient petroglyphs and pictographs.

Hidden in the hills of Hollywood, this secluded Oz-themed garden is dotted with dozens of thrones.

A semi-scholarly approach to sex.

Enormous lake at the bottom of a unique cave system.

America's most famous piece of self-built architecture.

One man's homage to the sun continues to grow like a glass fractal.

A 200-year-old bar in the historic French Quarter refuses to give up its place in history, nor its role in securing ours.

The final resting place of New Orleans' most famous voodoo priestess.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

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

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.