When this former hospital pharmacy closed in 2013 it already looked like a museum, so they turned it into one.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

Building owners can take out tiles for free at this repository for historic building materials.

This restored Portuguese cafe may well be the most beautiful place in the world to grab a Big Mac.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

This medieval manor house was equipped with secret compartments for hiding priests.

A hidden three-foot-wide house separates these two regal churches.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

A collection of anatomical samples from one of the first anthropologists to suggest that humans reached North America by crossing the Bering Strait.

Two stunning 17th-century libraries and a cabinet of curiosities.

150-year-old satirical tableaus made from stuffed frogs.

Hear the quietest sound from across the dome.

Wedged between two buildings at the Great Ormond Street Hospital is this secret music installation.

A subterranean ice warehouse that has lain hidden beneath central London for over a century is now open to the public.

Winding paths and ramshackle mausoleums in the oldest "park cemetery" in London.

This South London cemetery holds the remains of more than 15,000 people.

Sunset-colored dunes of volcanic ash make taking a poor photo impossible.

In the world's oldest university is a stunning 17th century anatomical theater carved from spruce.

The middle finger of modernity.

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