Art Deco and “Wrenaissance” mash-up, this recently restored royal residence has been home to kings and comes with secret monkey passages included.

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

In Twickenham sits a small whitewashed castle that inspired Mary Shelley's 'Frankenstein.'

Fantastically decorated underground chambers built in the 1760s.

The monster at the center of the Darwin Center Spirit Collection.

A hidden treasure in London with a rich medieval history, and the resting place of many luminaries.

Shakespeare, David Bowie, Dr. Who, the Saxons, Druids and Romans are all claimed to have all made their mark on these massive man made tunnels.

A historic arboretum and non-conformist, non-denominational park cemetery.

This 1920s Dutch barge is now a floating bookstore.

Abstract dinosaur models in London.

A toy store with a century-long history preserves the craftsmanship of playthings of the past.

A cluttered and astounding collection of antiquities and curiosities.

A mysterious artist-run cabinet of curiosities and library.

This wildly-tiled artist's palace is a living and growing account of the creator's life, loves, and labors.

Remnants of a Victorian garden feature sitting in public woodland.

Catacombs turned marketplace.

Rebuilt remains of a temple to Roman god Mithras.

A hands-off space for graffiti artists to hone and display their skills.

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

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

Famously misunderstood wonder of the ancient world

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

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

This South London cemetery holds the remains of more than 15,000 people.