"We Seceded Where Others Failed."

After the attack on Pearl Harbor, rocks and fossils from every U.S. state were collected into a pyramid of national unity.

France's national museum of scientific and industrial instruments.

A favorite Paris bar for U.S. expats, including Gershwin, Hemingway, and James Bond.

This surreal statue brings a famous French novel about a supernatural cad to arresting life.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

This Budapest bar allows drinkers to leave their mark on the walls, floor, and even ceiling.

Once a favorite playground for the world's most illustrious guests, Hotel Nacional's secret weapons and bunkers reveal a more menacing side to its golden history.

The house that birthed The Old Man and The Sea is now a museum devoted to the old man who wrote it.

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

The most confusing clock in New York.

Commemorating the spot where the famous scientist fed his pigeons.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

Everyone from Mark Twain to Teddy Roosevelt has a pipe hanging from the walls of this historic chophouse.

Spinning silently in the lobby of an Art Deco masterwork is a massive vintage model of the Earth.

Cryptic messages embedded in the New York City sidewalk.

The humble home where the famous beat author lived briefly and wrote one of his most famous works.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

A monument celebrating the idea of reaching inaccessible places.

An idyllic swimming pool tells the tale of Hemingway's trouble with women.

This statue inspired by Renoir's famous painting embodies the jovial spirit of Key West.

The birthplace of American international flight service has been turned into a celebrity's microbrewery.