Iceland: home to volcanoes, waterfalls and, apparently, Santa?

These ruins of a pre-Columbian cliff village are among the most beautiful and well preserved in New Mexico.

A collection of haunted artifacts chronicles the career of the world's most famous paranormal investigators.

It houses the remains of a 17th-century version of the Titanic.

A magical sinkhole on the Yucatán Peninsula is adorned with mini waterfalls and hanging vines.

The tiny statues form China's only known terracotta army from the Han dynasty.

Mysterious hillside with a continuously burning natural fire.

This Bogotá museum houses the world's largest collection of pre-Columbian gold relics.

The ruins of an ancient city built by Mayan traders is centered around a temple of a sacred feathered serpent deity.

The meteor that sealed the fate of the dinosaurs landed at this site, one of the largest impact craters in the world.

If you can look past the nearby sewer pipes, this urban sinkhole grotto is a mini-paradise.

The bright red stripes streaking across the rocks are the star feature at this Icelandic waterfall.

The shockingly unspoiled Peruvian tomb of the Lord of Sipan was once guarded by a footless warrior.

Death rituals and sacrifice inside a Peruvian megalith.

One of the world's tallest waterfalls wasn't revealed to the world at large until 2006.

If you’ve ever seen a picture of Machu Picchu, then you’ve seen a picture of Huayna Picchu—you just didn’t realize it.

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

This stunning 15th-century royal hill fort preserves the age of chivalry in Rajasthan.

Temples adorned with intricate, erotic sculptures make up one of the "seven wonders" of India.

9th century Abbasid mosque, damaged in modern warfare.

This "tower of death" has acted as an observatory, a religious hub, and an executioner's lair.

The second-deepest known cave on Earth, hidden in an extremely remote mountain region.

A graceful natural rock formation stands astride the point where the Gulf of California meets the Pacific Ocean.