This astronomically-aligned stone circle was the first of its kind to be built in Great Britain after a 3,000-year hiatus.

Some wattle-and-daub, a Moorish mural, a glacial erratic, and a Giant named Gilbert.

Legend says this ancient pagan site can cure all ailments.

This peaceful park with centuries of history hides in an overlooked section of South London.

A winding cave grotto walkway built to provide employment for veterans after World War I.

This hidden natural fountain issues forth a steady supply of supposedly healing water that tastes like rotten eggs.

One of several Lilliputian portals that are ready to transport passengers to other dimensions, if they can find them.

This British museum hopes to take the taboo out of poo.

The remains of the oldest synagogue in Britain lay forgotten for seven centuries, hidden under a humble shop.

This 15th-century fortification was built to defend bunnies.

A seaside town with no sea in sight.

This sculpture marks the spot where one of the greatest Roman rulers was proclaimed emperor.

An abandoned quarrying village turned commune is now a hub for learning the Welsh language.

A palatial former bank building now houses what may be the poshest art venue (and former Tesco) in Belfast.

A folly built to satisfy a gentleman's bet that he could drive his horses through the eye of a needle.

This centuries-old canal known as the Cuckoo Dyke has a staircase of locks suitable for a giant.

This tiny town features a tiny town that acts as a 3D snapshot of the town during the 1950's.

A lavish Victorian mansion wound up inheriting a gruesome reputation that would be its demise.

This natural history collection contains the bones of a circus elephant that seem to be chasing a whale skeleton.

The "father of immunology" used this humble hut to offer the local people some of the world's first free vaccinations.

This hidden bridge is where local children leave gifts and messages for the island's fay folk.

One of the most spectacular 18th-century bridges in Scotland.

An abandoned tower once used to study the cosmos hides within a thicket of greenery.

A remnant of the Roman army's presence on the coast of Scotland.