In Spain, the ruins of a Roman military camp sit along a flooded section of a river.

If there's another drive-through golf-cart bar in a bat-filled cave on top of a mountain, we don't know about it.

Thousands of colorful pirogues showcase ingenious craftsmanship at the largest fishermen port in Nouakchott.

The world's longest outdoor escalator takes visitors to the top of China's largest dam and is also shaped like a dragon.

The ruins of an abandoned church mingle with the graves at Oaxaca’s General Cemetery.

This fairy-tale castle would make Dracula (who is said to have been imprisoned there) jealous.

Eco-village hidden in the foothills of the Alps that created a massive system of psychedelic underground temples.

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

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

The remains of one of the last mining camps developed on the New River.

Known as the "Hobbit Houses," these storybook homes look like they're straight out of the Shire.

One of the city’s oldest watering holes was originally the home of a famous James Brown (not that one).

Sited in an Inner Mongolian desert are the remnants of an important trade stop along the Silk Road.

This quaint Italian town keeps losing ground as the sides of its plateau slowly erode.

An unfinished tomb carved into a giant boulder in the Arabian Desert.

The small sanctuaries lie just off the beaten path near one of Bhutan's most famous attractions.

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

A crumbling hospital from the 1850s on Roosevelt Island.

An old limestone mine transformed into a beautiful and unusual sculpture museum.

A subterranean relic of the Spanish Civil War hides below this picturesque park.

This landmark Victorian folly rewards visitors with spectacular views over the Peak District.

This 8th-century Bavarian monastery is home to an exquisite Baroque-era library.

Enormous sandstone towers loom within a Czech forest.

The ornate structure is part of a building boasting more marble than the Vatican.