One of the oldest scientific gardens in Britain, containing more than 13,302 plant species in its core collection.

The world's first underground farm is in a World War II bomb shelter beneath the streets of London.

A student driver's nightmare.

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

360° views of the city plus five floors of optical illusions and hands-on science.

This 1920s Dutch barge is now a floating bookstore.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

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

A 30-acre garden inspired by the principles of modern physics.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

A tongue-in-cheek arcade where the games are based on everyday life.

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

Banksy gives themself artistic license with this piece of London street art.

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

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

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

An easily overlooked stretch of ornate window fronts and gaslight lamps that could be right from the pages of Dickens.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

These fantastically named natural pools look like something out of a Scottish myth.

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

A kaleidoscopic warehouse-maze of handmade neon signs.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.