Dating back almost 400 years, the oldest public collection library in the United Kingdom was once the study hall of Karl Marx.

This Nazi ruin was the site where Hitler was almost blown up by a suitcase bomb.

The extravagance of Portugal’s "Pink Palace" resulted in a noble title being awarded to its owner.

This once-forgotten oasis in the middle of Lisbon was first created over a century ago quite by accident.

What do we know about the real woman behind one of the Beatles' most famous songs?

This frequently-photographed waterfall takes only a short hike to visit.

Florida might be at its most surreal in this museum devoted to the famed Spanish artist.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

In one Chicago park, a trio of werewolves are waiting to devour their fallen brethren.

The longest hedge maze in the world.

Two thousand artifacts from around the world collected by one woman who loved to travel.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

This castle resides in a valley known for immense bloodshed during the Middle Ages.

A collection of outdoor mystical statues paying homage to indigenous Australians and ecological stewardship.

A Manhattan courthouse hides a small but scathing memorial to Holocaust injustice.

Where Mary Shelley’s "Frankenstein" and John William Polidori's "The Vampyre" were born.

This colorful but controversial ceiling has been likened to a 21st-century Sistine Chapel.

This simple apartment may have inspired some of the most important theories in the history of science.

A Swiss board game museum housed inside a picture-perfect castle.

Enormous, fluffy dogs frolic around this museum dedicated to a legendary Saint Bernard.

This is not only one of the oldest collections in Europe, but also possibly the most beautiful.

This amazing pedestrian suspension bridge in the Swiss Alps would give Indiana Jones nightmares.

This 170-year-old Swiss guesthouse built into the side of a mountain is best accessed by a cable car.

A constellation of golden cobblestones shows the names of local children born under a full moon.