The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

Huge stone depressions which may have acted as an Incan agricultural experiment.

This Peruvian canyon is filled with geometric salt pools that have been being harvested since the Incan empire.

The longest floating boardwalk in the United States.

Decor at “Nevada’s Oldest Thirst Parlor” includes Raquel Welch's brassiere hanging from a stuffed moose head.

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

Protecting the future of some of the rarest and most misunderstood mammals of North America.

This locally-famous crevasse in New York State is icy all year round.

A mysterious echo seems to defy the laws of acoustics.

Bananas are often left for the first monkey America ever recovered alive after being launched into space.

A registered historic landmark shrouded in unsettling local legends.

Hunt for buried treasure in Nova Scotia.

A medieval castle in the middle of rural Texas.

Mounds, rune stones, and a 1,000-year-old church, left behind by Denmark's first two kings.

Six beautiful wooden giants are hidden around Copenhagen.

Vortex-shaped aquarium hosts Europe's largest school of piranhas and other ocean creatures.

This ordinary street was made infamous by a legendary visit from the devil.

Considered one of the most haunted places in Europe, this 800-year-old castle was home to noble prisoners.

A natural wonder in south Denmark.

The northernmost point in Denmark is a turbulent sandbar created by two clashing seas.

An enormous playhouse designed to look like 21 stacked Lego bricks, with another 25 million colorful Legos inside.

The original home of the Lego has a huge amusement park dedicated to the iconic plastic toy.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

Remembering the Alamo with a full-scale replica of the 1836 city.