Breathtaking and huge 430 year old maps of Italy.

Renaissance hospital featuring a rotating door into which unwanted babies were dropped.

This massive wooden building contains a giant Buddha, healing pillars, and tame deer wandering the grounds.

Over 120,000 curious objects that have shaped our modern world.

An ancient Egyptian temple in the middle of Madrid, Spain.

Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

This abandoned coliseum was intended to be a grand Nazi rallying ground before it was halted at the end of the war.

2300-year-old Roman road connecting the empire.

A restaurant and observation deck built in a unique broadcasting antenna.

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

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

France's national museum of scientific and industrial instruments.

135 bronze medallions mark a French meridian line which once rivaled the hotshot Greenwich timeline.

This massive library holds what was once the largest book collection in the world.

This former “ante-chamber to the guillotine” has been refurbished to illustrate the brutal history of French justice.

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

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

A unique collection of gilded age mechanical pianos.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.