A semi-scholarly approach to sex.

Stroll through a wonderland of stupendous moss-covered trees.

Giant busts of 42 U.S. presidents are sitting in a field in Virginia.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

A tiny theater hidden in an alley plays a constant stream of short silent films for anyone willing to peer through the peephole.

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

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

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

A winding path built in secret on the edge of the continent.

Resting place of Hollywood's immortals is also site of summer film screenings.

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

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

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

A collection of oddities including Dr. Kevorkian's suicide device, the Thanatron.

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

This Boston medical museum features the skull of the famous medical case of Phineas Gage.

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

A walk through the historic city center, under the streets of Seattle.

A miniature rainforest is growing inside of a Midtown Manhattan office building.

Elevated freight railway turned wildly successful urban park.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

It should come as no surprise that the best view of the Hollywood sign is from Batman's lair.