The approximate spot where the last Grand Master of the Knights Templar was put to death.

Stripes of human ashes cover a back lawn in the most sought-after burial grounds in Paris.

A simple plaque on the facade is the only reminder that the treaty ending the American Revolution was signed inside.

This little-known relic crypt holds stolen parts of a Roman Empress.

A popular shrine where the Blessed Virgin allegedly appeared in 1830, displaying a holy armchair and two incorruptible remains of Lady Saints.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

Once a 19th-century brasserie, this McDonald's exterior celebrates Alsatian design and the "King of Beer."

How did a French journalist’s grave become the sexiest statue in the cemetery?

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

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

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

A museum of carnival attractions where you are invited to ride the rides.

This beautiful 19th-century temple stands atop the ruins of its predecessor.

The Conduit Road Schoolhouse is one of the last one-room schoolhouses remaining in Washington, D.C.

Coins and medals straight from the mint await visitors to this shop in the nation's capital.

Look closely and you’ll notice that the color changes a third of the way up the tower.

The first presidential bomb shelter was located in an old vault under the Treasury, connected to the White House via tunnel.

Members of Congress have traveled between the buildings on Capitol Hill for a century hidden from tourists, press, and storm clouds.

D.C.'s first central library was born out of a chance encounter with the philanthropist whose name it bears.

The house where John Wilkes Booth conspired with his co-conspirators.

An atomic bomb-proof strongbox protects the U.S. Constitution from terrorists and thieves.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

People escaping slavery may have hidden inside a corpse vault.

A cavernous three-story, 43,800-square-foot basement that was forgotten about for 60 years.