The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

Fortified medieval tower house with lovely roof garden.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

The Pope’s secret escape route.

The final resting place of the poets Shelley and Keats.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

Send a postcard while vacationing with Satan.

Secret refuge and museum of the Duke of Florence.

Over 50 exquisite hand-painted Renaissance maps decorate a Medici storage room.

Breathtaking and huge 430 year old maps of Italy.

Paris' linguistic guide to the international language of, yes, love.

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

A majestic lion statue guards this Parisian botanical garden, and feeds on an unsettling item.

Rome's semi-secret peephole vista is also a former Crusader stronghold.

This Niagara Falls tourist trap is a world bright with neon and curiosities that will inspire love, hate, or a mixture of both.

The celebrated eyesore created by starry-eyed sweethearts.

A museum dedicated to the alleged Roswell Incident.

One part antique store, one part curiosities hodge-podge.

An enormous pink granite batholith, long attributed with spiritual powers by the Tonkawa Indians.

A store full of vintage and indie toys designed to bring out the kid in even the crustiest of adults.