The ruins of an Estonian prison are drowning in the quarry lake where the convicts were once forced to work.

"There's nothing there," and other lies the KGB told us.

Hotel designed by indie graphics artists.

Climb to the top of its spiral spire for spectacular views of Copenhagen.

A 19th-century subterranean reservoir repurposed as a contemporary art cave.

The only surviving piece of Copenhagen's 16th-century defensive wall.

These old World War II fortifications have been transformed into an unusual equine attraction.

Remnants of the Nazis' occupation of Denmark linger along the sand.

A public display of random paleontology.

Dozens of musicians have planted trees in this Danish park, and donated songs to go with them.

An old limestone mine transformed into a beautiful and unusual sculpture museum.

A failed attempt to control drifting sands yielded a gnarled sylvan wonderland.

Four alabaster giants contemplate the tides on the shore of Denmark.

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

This Danish rock field is actually a sprawling ancient cemetery holding the bodies of 700 Vikings.

A little-known cafe in an old copper bridge tower with 360-degree views of the harbor.

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

After nearly 60 years, there's still a bear at Paddington Station looking for help.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

This extensive collection covers thousands of years of Polish military history.

A memorial to the beloved brown bear that served in the Polish army during World War II.

Museum dedicated to "the man who moved the Earth."

A program of Communist glamour in post-Stalin Poland is preserved in this colorful museum.

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