Wedged between two buildings at the Great Ormond Street Hospital is this secret music installation.

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

Eighty million natural history specimens call this gargantuan museum home.

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 granddaddy of English geoglyphs dates back to the late Bronze Age.

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

Hidden in a grotto 26 feet below Nottingham's oldest hotel, this stylish subterranean drinking den is notoriously hard to find.

Early Islamic mosque with several strange conical domes.

Britain's oldest miniature railway.

Tucked among the sand dunes overlooking a Welsh beach, a real-life tribute to a fictional elf.

A museum dedicated to Wales’ favorite—and strangest-looking—watercraft.

During this yearly Welsh swimming race, competitors tread through the fetid waters of a bog trench.

Quirky Welsh observatory unites art and science.

The enormous earthwork sculpture honors the ponies that lived and worked in the old colliery.

The world’s only museum dedicated to baked beans.

A wildlife paradise, this island is one of the world’s most important habitats for burrow nesting seabirds.

If there's another drive-through golf-cart bar in a bat-filled cave on top of a mountain, we don't know about it.

A subterranean playground in an abandoned slate mine.

An Iron Age hillfort rooted in Arthurian legend was made famous by musician Peter Gabriel.

Below a historic English market town lies a secret underground city complete with kitchens, laundries, storerooms, and an underground lake.

The longest hedge maze in the world.

England's only square-dimension hill horse was built to celebrate Queen Victoria's coronation.

The geoglyph once sported a glass bottle eye.