Famed for its pie, this eatery has a hidden tunnel that allowed Catholics to secretly walk to church during the Reformation.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

Mural made of 100,000 pieces of hand blown glass, and until recently, the largest glass mural in the US.

Open-air museum with an elaborate sculpture garden, stretching for over 70,000 square-meters.

The last remaining example of the boatmen's perches that once dotted the south bank of the Thames.

Legend has it that seven Anglo-Saxon kings were coronated on this stone, located in the appropriately-named town of Kingston.

The last of Philadelphia's wood-paved streets is now a landmark of terrible engineering.

A long spiraling walkway winds through the woods, and around a copper beech tree at the center.

The granddaddy of English geoglyphs dates back to the late Bronze Age.

What started as a way to address damp basement walls turned into a house filled with intricate hand-carved designs.

Cycle, walk, or run up and down on an old historic railway path.

A Maryland museum dedicated to Black history, housed in a historic church.

This half-forgotten fortress was constructed by the Ottoman conqueror of Constantinople.

A monument to the thrice mayor of London who according to lore made his fortune by selling his rat-chasing cat.

The graveyard is filled with beautiful funerary art and boasts breathtaking views of Florence.

This public space is speckled with the eerie remnants of a defunct amusement park.

A hidden gem in the middle of the city's infamous Jewelry Quarter.

This colossal ancient sculpture of the monstrous Aztec rain god has a literally stormy history.

The floor of this spectacular Baroque sanctuary is covered in memento mori.

The walls of a colonial-era fort encircle a small, tropical assortment of plant life.

Eighteen miniature death-scene dioramas.

Rowdy rebels fortified this home during the first popular uprising in United States history.

Once an indicator of social class, the color blue has come to define this city on the edge of the Thar Desert.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.