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

This innocuous-seeming building is actually the remnant of a major wartime brothel.

A 16th-century fountain marks the site of a lost medieval cemetery once filled with mass graves.

Remains of Roman amphitheater hidden in a sleepy quarter of Paris.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

Site of a classic 19th-century physics experiment to prove the earth is rotating.

France's national museum of scientific and industrial instruments.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

A mechanized clock where a man fights off a dragon, crab, and rooster.

This modest marker near Notre Dame identifies the very center of Paris.

France's most famous cemetery, with some of its most curious tombs.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

Holding multiple historical boats and an entire 19th century village, this New England attraction is the largest maritime museum in the world.

The largest collection of historic military firearms in the United States.

The US Navy's only submarine museum is also home to the world's first nuclear submarine.

A humble air museum located in an original World War II aircraft factory.

This historic railway museum may have lost its passengers but not its love for trains.

This classic steam-powered train takes tourists on a nostalgic trip around the Connecticut River Valley.

This museum holds a fully-functional replica of the "Turtle," the first American submarine ever built.

A former copper mine which became a truly unsuccessful prison.

The headquarters of the famous Yale society.

While many places make the claim, the Library of Congress says this restaurant is the birthplace of the hamburger.

Panoramic views of the city of New Haven and the Long Island Sound, with a side of history.

Quirky castle designed by the American actor best known for portraying Sherlock Holmes on stage.