A museum dedicated to the history of a terrifying secret police is now held in their former headquarters.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

An architect's childhood fantasy treehouse made real.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

South Dakota's oldest operating brewery is housed inside a historic firehouse.

Every president in history is immortalized in bronze in downtown Rapid City.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

This trio of stone spires claims to be the only preserved medieval execution site in Europe.

Largest island in the Baltic Sea experiences such idyllic weather that roses bloom in the middle of December.

Go inside to really appreciate this 500-year-old technological masterpiece.

100 year tradition of fist fights, marked by marble footsteps.

The yawning maw of this pagan visage is said to bite off the hands of liars.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

Hidden beneath the famous St. Peter's Basilica is a veritable city of the dead that may hold the remains of St. Peter himself.

Rome's semi-secret peephole vista is also a former Crusader stronghold.

The final resting place of the poets Shelley and Keats.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

2300-year-old Roman road connecting the empire.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

The glowing blue Nymphaeum of Emperor Tiberius.

Pilgrimage site for star-crossed lovers.

A stone slab in Madrid marks the point from which the distances of Spain's national roads are measured.

Take respite inside this jaw-dropping church while climbing the volcano where Georgia's Prometheus was once chained.

Luxury hotel turned into a refugee camp, then turned back into a luxury hotel.