This historic island prison holds one of the dungeons from the Count of Monte Cristo even though it is a work of fiction.

The recovered bones of martyrs slaughtered during The Terror are on display in this church crypt.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

The narrowest street in Paris.

In the best of all possible worlds, everyone will get a chance to see this statue in which Voltaire's heart is interred.

Known as the "Dodo Manège," this carousel features a herd of animals that have disappeared—or may be gone soon.

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

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

This Welsh village gave itself a ridiculous name in a publicity stunt a century ahead of its time.

A subterranean playground in an abandoned slate mine.

A cruise ship retraces the the route of the doomed RMS Titanic, 100 years later.

After this beloved Cambridge character passed away, the community raised funds to provide him with a proper gravestone.

Despite the name, this ancient piece of crystal may not have been a lens at all.

A comfortable-looking armchair and a grandfather clock have been sitting on this sidewalk for the last 30 years.

This cathedral's stained-glass patchwork of psychedelic colors and shapes was put in place long before the swinging 60s.

In England, an 18th-century water-powered workshop still stands.

This lonely metal cross may hint at the true location of a medieval showdown between Christian and Pagan kingdoms.

This unique museum is housed in a rare example of an early 19th century prefabricated cottage.

A disastrous D-Day rehearsal was relatively unknown until this sunken tank was discovered 40 years later.

A rare example of this century-old British tank stands near the center of town in Ashford.

This 20th-century replica of a 13th-century castle has itself fallen into ruin.

An 18th-century estate owner thought these cottages were an eyesore, so he artfully disguised them as a church.

A statue of the original Pearly King is hidden in a church's crypt.

A holy well supposedly infused with a saint's spirit flows within this quaint chapel.