400-year-old garden, restored to beauty.

The ruins of this gorgeous clifftop castle look like something from a fantasy novel.

London's smallest police station is barely the size of a phone booth.

Eighty million natural history specimens call this gargantuan museum home.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

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

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

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

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

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

The patch of land below the memorial was gifted by the British to the United States.

The first archaeological site discovered by aerial photography.

This well-preserved Cistercian Abbey in a romantic pastoral setting has inspired artists like the poet Wordsworth.

The largest of only eight working transporter bridges left in the world.

The highest peak in Wales is said to be the final resting place of a giant killed by King Arthur.

A magical and peaceful ruined Cistercian abbey in what is now southern Belgium.

Climb inside an iron crystal magnified 165 billion times its normal size.

Theme park featuring miniature replicas of European monuments.

Lavish royal estate punctuated with heated greenhouses.

From Tintin to the Smurfs, Europe's greatest graphic icons are celebrated in a grand Art Noveau gallery.

A fantastical 13th-century fortification sandwiched by a modern hotel in central Brussels.

Brussels' favorite peeing boy has a sister.

A little sculpture with a large wardrobe.