The crumbling structure is a rare surviving relic of the area's bygone mining industry.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

A toxic ghost town sitting atop a massive coal fire.

Home of an evil witch famous within southern folklore.

Get lost in this haunting fairytale art walk through a man-made eucalyptus grove.

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

Enormous lake at the bottom of a unique cave system.

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

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

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

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

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

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

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

A 140-year-old castle with underground caves hidden in San Francisco.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

Remants of foundations, streets, and streetcar tracks inhabit the cliffs where a landslide occurred in 1929.

These old stone ruins in the Oregon wilderness were once bathrooms and are steeped in legends of murder.

On the Oregon coast there is a natural hole that seems to be draining the sea.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

A psychedelic labyrinth on the San Francisco bay.

An artsy hidden staircase leads to breathtaking views of San Francisco.