An Aztec temple, the largest man-made pyramid in the world, sits buried in earth with a Spanish church set on top.

A fire lookout atop a glacial pinnacle is reached by climbing three vertiginous flights of stairs.

For decades, a bottle factory dumped their waste into these waters—now it's considered the best sea glass beach in England.

The United States Capitol's former columns still stand.

Enormous piles of historically significant stones, dumped by Congress in a forest, and abandoned for 60 years.

A porcelain company's former dumping ground, completely covered in pieces of collectible ceramics.

This mountain trail inspired Nietzsche to complete his magnum opus.

This medieval mountain town is also known as the "Village of Streams."

Much of what constituted mid-century Liverpool now litters a beach outside of town.

A bizarre house filled with an astounding array of collections.

In a 345-million-year-old cave that's 200 feet underground, dinner awaits.

The magical, mossy forest that inspired Princess Mononoke.

These magnificent city walls rise from the barren sun-baked Spanish plains like something straight out of a fairytale.

Since 1887, this old-school shop has stacked its shelves with extraordinary coffees and teas.

The vertical-axis windmills of ancient Persia have been grinding flour for 1,000 years and counting.

An ancient stone fortress considered by many to be the eighth wonder of the world.

Spend the night in this formerly abandoned traditional Scottish village.

A pair of slides and a tree-lined stair corridor have been an urban oasis for nearly 40 years.

In this century-old literary safehouse, print is alive and well.

The world's first permanently occupied mountain-top observatory continues to report on the stars.

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