Colorful lights and mirror-like brine pools create trippy illusions within the historic mine.

A little known Colombian theme park of giant curiosities.

The Andean town where every single building is decorated with a brightly colored frieze.

Former drug lord’s manor, now a theme park. Watch out for the hippos.

Unparalleled stargazing, one of Colombia's best observatories, and a swimming pool can all be found in the middle of this ancient tropical forest.

The caldera of this mini-volcano has been turned into a naturally heated mud bath.

A 10 million-ton rock once worshiped by the Tahamies Indians, accessed by an astounding staircase.

Enchanting cave with a river crashing through the roof.

A dangling church built over a Colombian gorge.

This picturesque mansion has gone from opulent ruin to nature museum.

An explosion of natural color known as "the river that ran away from paradise."

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

This handsome giant is said to mark the birthplace of the mythical woodsman and even had a cameo in a Stephen King novel.

The house and graveyard used in the Stephen King spine-chiller.

The eccentric mansion of one the most popular horror authors of modern times.

This portion of a lovely Belize beach is infested with (harmless) sharks and rays.

They squeal, they nosh, they look like predators.

No one really knows how these old hobby horses got here, but the herd keeps growing.

19th-century operating theatre in which the use of ether was first demonstrated - plus, a skeleton and a mummy!

Final resting place of the author who wrote the ghost story "The Turn of the Screw," and his brother, the Harvard doctor and paranormal investigator.

MIT students continue the legacy of beloved professor "Doc" Edgerton through learning by doing.

One man's psychedelic fence is painted with his cacophonous folk art musings on the world.

This massive World War II calculator hearkens back to the days when "computer" was a job title.

This nearly endless university hallway is home to a unique sunset known as "MIThenge."