At the center of London’s oldest roundabout stands an obelisk that was erected in 1771, but spent several decades elsewhere.

An architectural oddity hides in plain sight on this iconic London bridge.

The wooden telephone box hidden away in London's Piccadilly was the original prototype of the iconic kiosk.

Hear the quietest sound from across the dome.

Eighty million natural history specimens call this gargantuan museum home.

This bridge was constructed from the rubble of the infamous Bastille.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

The legendary giant's severed hand sits on Antwerp's popular shopping street.

This building has a giant piercing through one of its corners.

This fountain is dedicated to the workers who perished constructing the Fréjus Rail Tunnel.

A fake medieval village in the middle of Turin.

The intricate geometry inside this Baroque-style dome was designed to create "terror of the human soul."

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

This large, circular tomb is the final resting place of the first emperor of Rome.

At the crypt of St. Mary of Eulogies and the Dead you are left alone to ponder mortality among piles of skulls.

2300-year-old Roman road connecting the empire.

This hidden Art Nouveau courtyard is an opulent feast for the eyes.

The abandoned "Red Star Train Graveyard" is the final rusting place for precious artifacts of train history.

Hungarian Jews were ghettoized during the Second World War, but little remains of the original wall that closed the Jewish people off from the rest of the city.

The holes in this wall provide a glimpse into Jewish life in Budapest, both past and present.

A triumphant marble and bronze fountain depicting a 15th-century Hungarian king and his hunting party.

This building has survived for more than a century and remains virtually untouched.

Uh, pardon me, ma'am, but I couldn't help noticing that there's a Columbo statue in the middle of Budapest.

A Trabant car, a kangaroo statue, and a plethora of plants take over this abandoned-factory-turned-bar.