A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

Franciscan monks created a facsimile of the Holy Land for North Americans who couldn’t afford the trip overseas.

Long-abandoned trolley tunnels just a mile away from the White House are turning into an art space.

The United States Capitol's former columns still stand.

An extraordinary collection of 18th century anatomical waxworks.

The mummified relic of St. Catherine sits forever on a golden throne.

In the world's oldest university is a stunning 17th century anatomical theater carved from spruce.

Wax models of disease and deformity are on display at this German medical museum.

Remnants of an exploded schooner and wrecked submarines form a breakwater.

A fascinating little museum dedicated to the thousands of chemical substances concealed in our food.

Hamburgers are intensely proud of their tunnel beneath the river.

The broken skateboards that became a poignant memorial to a murdered skater.

The cedar tree in Highgate Cemetery earned its title by accident.

A hidden treasure in London with a rich medieval history, and the resting place of many luminaries.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

A naturally mummified 2,000-year-old man.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

The largest of London's subterranean rivers and once a mad, bad center of London life.

The quaint little store that is said to have inspired a famous Dickens novel was only given its name after the book was released.

Wedged between two buildings at the Great Ormond Street Hospital is this secret music installation.

The signs of a long buried road can still be found hidden beneath a London sewer grate.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

These official units of measurement—including chains and perches—lie hidden beneath tourists' feet in a popular London hub.

The only university zoological museum in London houses extinct animals, bizarre natural history specimens, and a Micrarium of microscopic creatures.