A secret rendezvous spot where John S. Mosby and his Rangers would meet to divvy up their loot after raids.

A glorious pub known for a spiteful printing feud and its famous typeface lost—then found—at the bottom of the Thames.

Never actually a tree at all, this spot was the site of London's public hangings for nearly 600 years.

A historic London pub with prison cells in the cellar and a "spy room" on the second floor.

Outside of one of Britain's most renowned social clubs, a step installed specifically for the Duke.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

A bronze bust commemorates the heroism of the secret agents who led covert operations against the Nazis.

A faded reminder of what was once a common sight in London during the Blitz.

This overlooked street light once served as a KGB dead letter box.

Oldest Protestant church in the Middle East, designed to resemble a synagogue.

This unassuming oasis elevated just above the busy streets of Jerusalem offers one of the best views of the Old City.

The only quarter of the Old City not dedicated to a major world religion.

Descend 2,030 years into the past in an ancient tunnel built to support Jerusalem's most famous wall.

Stone markers on the campus of Gallaudet University commemorate a peculiar school tradition.

This tree was grafted from the actual tree that led Isaac Newton to ponder the theory of gravity.

A mythical garden that once grew the golden apples of wisdom is said to have existed in this ancient Moroccan city.

Granny Smiths and Fujis can both be traced back to Kazakhstan, where apples still grow wild.

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

The palace window through which Protestant nobles flung two Catholic regents, thus sparking the Thirty Years' War.

This massive library holds what was once the largest book collection in the world.

A massive underwater sinkhole made famous by Jacques Cousteau.

Mysterious library of an infamous financier and spiritual seeker.

One of the oldest surviving bars in the United States, located at the site of the last skirmish of the American Revolution.