The remains of Crystal Palace Great Exhibition of 1851.

A relic of Victorian grandeur hides beneath a busy South London road.

A wonderfully eclectic Victorian aquarium lies in the basement of the Horniman Museum.

A steam trawler with a whiskey-soaked history driven ashore in 1960 resides rusty but still standing on the shoreline.

For centuries no one knew there were hundreds of bones and precious artwork hidden beneath this Swiss church.

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

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 churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.

The world's largest collection of witchcraft regalia.

Famously misunderstood wonder of the ancient world

The atmospheric road was never meant to be so creepy.

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

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

The longest hedge maze in the world.

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

This castle was established by the 4th Duke of Montrose and is connected to the Buchanan Clan.

This tangled English forest looks like something right out of a fairytale.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

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

Surreal riveted sea forts once protected the Kent shores from German attack.

400-year-old garden, restored to beauty.

A unique waterfall that some believe attracts the fairfolk.

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