Hidden in plain sight, a gravestone seemingly inscribed from the future stands among the cemetery’s historic tombs.

The final resting place of the author who gave us the Little Mermaid, the Ugly Duckling, and many more beloved fairy tales.

The world's first combination ski slope and power plant.

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

This colorful artistic feature atop a Danish art gallery allows visitors to stroll through a rainbow.

Hans Christian Andersen for the postmodern world.

This floating sculpture of ice is a poignant reminder of nature's power.

This arch granting triumphal entrance into Antalya was designed to honor the emperor's visit.

Located in the middle of public park, this cave built in the early 19th century houses an ancient stone sarcophagus.

While the U.S. and Soviet Union were engaged in a space race, Poland built a UFO on the ground.

This bridge's unique architecture honors nautical heritage and encourages self-awareness.

Old Danish castle immortalized in Shakespeare's Hamlet.

The gilded, masterful astronomical clock will calculate time, dates, and planetary positions for thousands of years to come.

A 15-foot-tall statue of the head of the Sopranos family greets passengers at a train station in southeastern Lithuania.

Over time, this castle grew to encompass the entire island.

An abandoned masterpiece of Soviet Brutalist architecture.

A century-old prison in the heart of Vilnius is now a lively bar, dance club, and artist residency.

While this monument tile is shrouded in mystery it also marks the end of the longest ever human chain.

This micro-nation may be some sort of prank, but its constitution sure seems official.

A wide array of locomotives call this outdoor museum home.

Discover the car that once belonged to the King of Nepal in a former Soviet-era taxi park.

A 300-kilogram egg sculpture that embodied a neighborhood revival.

Rub it for a bit of good luck.

Legend has it that Napoleon Bonaparte fell in love with this Gothic church.