Climb inside an iron crystal magnified 165 billion times its normal size.

This sculpture marks the spot where one of the greatest Roman rulers was proclaimed emperor.

A Reformation-era fiery figurehead once denoted this location as a print shop.

These 20-foot jaw bones honor a time when the leviathan bones were a sign that whalers survived the hunt.

The view that inspired the scenes of Dracula's first landing in England.

The gloomy ruins that inspired Bram Stoker to bring Dracula to life.

A vintage fire engine is hidden inside this World War I-era water tower.

A small side chapel in Santa Fe's basilica is home to the oldest statute of the Virgin Mary in North America.

A unique geological area spiked with wind-carved rocks that resemble teepees.

A one-of-a-kind sundial at the Very Large Array honors a radio astronomy pioneer, incorporating the original piers from his breakthrough radio telescope.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

A remote Arctic museum focusing on the science of icebergs and the archaeology of an ancient Inuit settlement which lies just outside its doors.

The world's most charming instant portrait studio also happens to be its smallest.

The great polar explorer is remembered in this far northern town, where he embarked on his final expedition.

This military tunnel dates back to World War II and provides visitors with a little wartime adrenaline.

Piran’s oldest square is laden with history and a beautiful 18th-century reservoir.

This truly palatial work of Communist-era architecture now sits crumbling on a Croatian beach.

Hitler's bleak vision of relaxation still stands as a mostly abandoned 10,000-room resort complex.

Deep in the forest of northern Denmark, this secret underground bunker was built at the height of the Cold War.

This Danish park has celebrated the American independence day since 1912.

This modernist tower was saved by a fraternity with a 500-year-old penchant for shooting at wooden parrots.

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

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

This Danish castle is supposedly haunted by a woman too independent to not be a witch.