An unassuming London park is actually a pilgrimage site for modern clowns.

These marks in Myddelton Passage aren't your run-of-the-mill vandalism, and they weren't made by your typical vandal.

An eccentric 18th century naval officer built a ship's quarterdeck on his roof, the inspiration for Mary Poppins's "Admiral Boom."

This pump on the bad side of Victorian London betrayed a horrifying revelation about the water supply.

Ship-sized kinetic sculptural fantasy.

Scattered throughout London are ancient remnants of the city's former bounding wall.

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

Museum dedicated to the UK's first charity for abandoned children, with keepsakes of the mothers who left them behind.

This historic building displays the remains of a victim of the devastating 14th-century plague.

A mysterious pair of mice eating a piece of cheese is London's smallest public sculpture.

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

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

Formerly known as Saville Theatre, this mid-20th-century entertainment hub includes an ornate frieze.

Installed at a chaotic intersection, this gave London traffic cops a place to hang their heavy woolen coats.

The Tudor-style cottage in the middle of the square is not quite what it seems.

The London statue that imitates passersby.

The bridge is a secret gallery of discarded gum that has been transformed into miniature masterpieces.

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

Unusual British home built to disguise a water tower.

A village on the east coast of England that has almost completely eroded into the North Sea.

This melancholy headstone is the only remaining evidence of a medieval church lost to the sea.

This secluded walkway overlooks a magnificently wild London green space.

An ancient necropolis of magnificent tombs.

A sturdy relic of Britain's once crucial gunpowder industry is now a haunting Cornish ruin.