The names Lúthien and Beren can be found inscribed on the shared grave of the famous writer and his beloved wife and muse.

One of Europe's oldest libraries.

Bored potato-guarding Nazis etched their thoughts onto a brick storage building in Copenhagen's Meatpacking District.

The art museum is decorated with creatively remodeled pre-Nazi swastikas.

This long line of cement defensive wedges is named after the famous chocolate bar for obvious reasons.

Large Hadron Collider and the Birthplace of World Wide Web.

The bears of Bern have been a city highlight for over 500 years.

A nearly 500-year-old sculpture depicts a man eating a sack of babies, and no one is sure why.

Early habitat dioramas and home of the elusive gaff, the skvader.

This homeless brass fox tugs at your heartstrings from the foot of a Stockholm bridge.

Sweden's "good old days" painstakingly re-created in a model village.

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

This chimerical bridge/tunnel appears to dead end right into the sea.

20-foot tall lamp mumbles Swedish to celebrate the holidays.

Swedish mice can dine at the Nuts of Life restaurant or take a date to the amousement park.

One of the world's few mounted blue whales, its jaws are hinged open allowing visitors to descend into a lounge.

Turntable anonymously received orphans, alms, and groceries.

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

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

This abandoned mansion has a window for every day of the year, and is a temple for ghost hunters.

Spanning the El Chorro gorge, this pathway used to be one of the most dangerous crossings in the world.

The ruins of an ancient stadium that hosted gripping chariot and horse races.

The final resting place of the great navigator, or maybe his brother.

The world's largest wooden structure.