Only a few pieces remain of the structure that carried people and goods across the Thames for some 600 years.

Repository for more than 22 million pickled specimens.

One of the world's largest collections of pathological specimens.

A Victorian natural history and ethnographic museum with wonderful turn-of-the-century, science-book-esque evolution displays.

This coffee shop lies hidden beneath a historic church.

A mysterious artist-run cabinet of curiosities and library.

A network of concealed passageways lies within a busy London Underground station.

This hidden green space is the city's second largest conservatory.

The curios of pharmacist and collector Henry Wellcome.

The anatomical-pathological collection of a man who changed surgery.

A vast overgrown cemetery, once known as one of London's "Magnificent Seven."

An unusual round church in London with a Templar past.

A special shop catering to the needs of things that go bump in the night, and also helps kids become writers.

Catacombs turned marketplace.

The only university zoological museum in London houses extinct animals, bizarre natural history specimens, and a Micrarium of microscopic creatures.

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

This 1920s Dutch barge is now a floating bookstore.

This unassuming building produced some of the world's most famous bells.

The world's oldest surviving anatomical theater, where "the dead are pleased to help the living."

Stare out over the lagoon and beyond from this 10th-century campanile on the island where the city of Venice began.

Go inside to really appreciate this 500-year-old technological masterpiece.

Those who own or stay at this 500-year-old, allegedly cursed house often meet terrible fates.

This palatial spiral staircase was so unusual the name "snail" was given to the noble family who built it.

According to tradition this is the oldest church in Venice, but its actual age is a mystery.