Limestone caves with spectacular showcase chambers.

A stone pillar marking the location of the westernmost battle of the American Civil War only honors one side of the conflict.

America's only nuclear missile silo open to the public.

This church on a Tohono O'Odham reservation has stood since 1797.

Browse an impressive collection of passenger and military aircraft dating back to World War II.

Visitors to this public park will also find the ruins of an old western fort.

One of the oldest Mexican restaurants in the United States air-dries its trademark beef in a dangling outdoor cage.

A massive museum preserving the United States culture and the home of Abraham Lincoln's sleigh.

Canada's largest graveyard boasts a lot of noteworthy artifacts as well as its own computerized mapping service.

The Battle of Atlanta in 360 degrees, featuring a corpse that bears a striking resemblance to Clark Gable.

This "second" cemetery represents New Orleans' attempt to keep cholera at bay.

This cathedral dedicated to Louis IX, sainted King of France, holds many secrets.

The oldest cemetery in New Orleans, resting peacefully for over 200 years now.

Formerly known as National D-Day Museum, this collection commemorates the battles of Normandy and WWII.

The state's oldest continuously operating museum houses more than 5,000 Civil War artifacts.

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

The mummified heart of Louis XVII, the lost dauphin of the French Revolution.

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

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

Montmartre's sole surviving windmill became an iconic landmark for 19th-century painters, artists, and bohemians.

Ordinary art transforms to extraordinary thanks to locals' quirky sense of humor.

Exquisite wall sculptures carved in secret by an early quarryman in an obscure corner of the Paris Catacombs.

Twelve grave-faced marble angels guard the emperor's tomb at Les Invalides.

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