Sitting in the arguable birthplace of the Wild West, this museum holds the largest collection of bronco busting bric-a-brac in the world.

One of America's first spies started out as a teacher in this little red one-room schoolhouse.

Holding multiple historical boats and an entire 19th century village, this New England attraction is the largest maritime museum in the world.

Quirky castle designed by the American actor best known for portraying Sherlock Holmes on stage.

The former home of Samuel Clemens and family remembers the happiest period of the author's life.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

This Berlin island is home to a flock of free-roaming peacocks, as well as a historic ivory folly.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

2300-year-old Roman road connecting the empire.

A luxurious 1880s hotel with its fair share of Tiffany stained glass, Edison electricity, and of course, ghosts.

An old world fairytale-land with over 350 fairy folk figurines hidden amongst 800 year old cedars.

148 feet long and in the middle of a verdant forest.

A modern mechanical planetary system, part of a 10,000 year clock.

This grand mansion has starred in everything from Bones to Buffy.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

Northern Ireland's Brobdingnagian stepping stones.

Less a museum than a bizarre fantasy world created by artists and engineers.

The underground sanctuary of a mysterious ancient cult.

Perfectly preserved ancient monastery in an impossibly dramatic location on a rocky island in the Atlantic.

The oldest surviving bridge in New York City, which reopened to pedestrians in 2015.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.