The history of radiation is on safe display at the foot of a radiation science laboratory.

The ruins of a Duke's bucolic dream, where camels once roamed alongside "Dutch" windmills and faux-Italian vineyards.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

France's national museum of scientific and industrial instruments.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

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

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

The oldest stone house in Paris was built by its most famous alchemist.

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

The second oldest continuously operating bar in Louisiana.

A 200-year-old bar in the historic French Quarter refuses to give up its place in history, nor its role in securing ours.

This bar named after the world's first mixed cocktail was home to one of New Orleans' most notorious politicians.

The only rotating bar in New Orleans has been slowly spinning since 1949.

This cheese shop also houses a museum devoted to Dutch dairy.

This diner serves Route 66 nostalgia and what it claims is the 'original' hot dog on a stick.

Since 1956, this quintessentially New England seafood shack has been boiling its lobsters in seawater over wood fires.

Kitschy nautical-themed bar has offered mermaid shows and underwater ballet since 1956.

Delaware's first railroad lasted only five years and spanned only 16 miles, but its ticket office has survived for two centuries.

This statue of two men in a rowboat was erected to honor those who died while fishing in the Chesapeake Bay.

The C. A. Nothnagle Log House stands as the oldest surviving log cabin in the United States, offering a remarkable glimpse into America's colonial past.

The first partially complete dinosaur skeleton was discovered here, forever changing the world's view of the ruling reptiles.

The sign that drew attention to a young boy's cucumber stand is now the name of his fruit superstore.

A small poultry graveyard in the courtyard of a popular Key West watering hole.

Florida's oldest bar was once a morgue, complete with a hanging tree and gravestones.