This staircase in a lush tropical grotto was built by enslaved laborers and renamed to honor Queen Victoria's role in ending slavery in the British Empire.

Send a postcard while vacationing with Satan.

These azure waters were thought to lead to the Mayan Underworld.

This bridge was constructed from the rubble of the infamous Bastille.

The floor of the oldest surviving synagogue in the Americas is entirely covered in sand.

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

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

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

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

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.

If you look closely at the oldest bridge in Paris, you might notice hundreds of ugly faces leering from its sides.

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

Shipwrecks, ruins, and turtles are all that remain on this haunting Caribbean ghost island.

On this stunning Scottish island, you can walk in the footsteps of dinosaurs.

This beloved Baltimore spot features caged dolls, a giant Pez collection, and many, many mannequins.

An eerie, decaying ghost town destined to fade into the forest.

A local farm's collection of unusual structures from a now defunct storybook amusement park.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

The 19th-century pharmacy (now a used bookstore) was featured in James Joyce’s "Ulysses," and has changed very little to this day.

Massive still life just off the highway in Kansas.

Iceland's largest geothermal mud pool is a little bit haunted and a little bit dangerous.