Hidden beneath a beautiful overlook you’ll find the history of the city depicted in comic strip format next to a pay toilet.

The world's oldest bookshop still in operation.

Once a resting spot for King Fernando VII.

An unusual, super-sized grocery adventure awaits in an Ohio suburb.

Rare recess caves fill this unbelievably beautiful Ohio park.

The remains of a convent turned military barrack in the heart of Madrid.

One of Madrid's most beloved statues is of an anonymous citizen.

Part of the medieval watchtower is displayed in an otherwise ordinary parking garage.

These three pillboxes still remain as a witness of the Spanish Civil War in a park of Madrid.

Practice your Dirty Dancing lifts in the manmade lake where Johnny Castle himself did.

One of Ireland's most infamous prisons for rebels including men, women and children.

The enchanting archway is the only surviving portal into Dublin’s lost medieval wall.

A throwback train ride transports passengers through one of the lesser-known national parks in the country.

This spectacular public market has got meat, fish, vegetables, baked goods, and enough kielbasa for a lifetime.

A dazzling display of lights and crystals.

There’s a hidden military meme engraved on the World War II Memorial.

A tiny monument to the unsuccessful attempt by Thomas Jefferson to place the prime meridian in Washington.

Where America’s first doomsday cult awaited the end of the world.

This Philly cemetery is the eternal home of many famous area residents, including Rocky Balboa's wife.

The world’s first penitentiary, meant to be humane, drove men insane.

Golden and naked, the figure that was once the highest point in New York is all that remains of the second Madison Square Garden.

This bleach-white graveyard overlooking the ocean is accessed through a tunnel.

When this 18th-century observatory's meridian was moved, it set Sweden's time back by 0.04 seconds.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.