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

This collection of illusory paraphernalia has been culled from the history of London's premier magician's club.

The curios of pharmacist and collector Henry Wellcome.

The library houses an incredible collection of some of the world's most impressive books and manuscripts.

This 1920s Dutch barge is now a floating bookstore.

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

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

A musical composition 1000 years in length plays at the Trinity Buoy Wharf in London.

Nearly 2 billion seeds from 38,000 species are stored and processed at this visitable facility in a quiet corner of England.

This WWII aircraft museum presents its wrecks like taxidermy, complete with recreations of the crash sites.

The elegant structure of this 19th century railroad bridge creates an illusion of infinity.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

A collection of machines designed to break things for science.

The bridge is a secret gallery of discarded gum that has been transformed into miniature masterpieces.

In this cobwebbed old operating theater, you can practically hear the screams of the unanesthetized patients.

Its collection includes a broad array of social, geographic, graphic design, and political history.

Hidden beneath the streets of London is a secret subway that only carried mail.