The British monarchy's stamp collection is one of the most impressive in all of Europe revealing generations of royal nerdery.

An exercise in radical design and social living that became the epicenter of Soviet spy networks in London.

There's a strange stone hoodoo towering atop a wooded hillside and no one is quite sure how it got there.

These mysterious Viking chess pieces spent centuries hidden on a remote Scottish island.

This ancient oak plays host to carvings of magical elves, gnomes, witches, and other creatures prominent in local folklore.

This former quarry is now a vibrant labyrinth of magical in situ sculptures.

The commemorative stone column conceals a secret laboratory.

This beautiful deer park was built so King Charles I and his court could go hunting while escaping a deadly plague outbreak.

A domino effect created with Britain’s iconic telephone boxes.

This coffee shop lies hidden beneath a historic church.

The last four extravagant street signs of London's historic banking street.

The library houses an incredible collection of some of the world's most impressive books and manuscripts.

Never actually a tree at all, this spot was the site of London's public hangings for nearly 600 years.

A plaque hangs near the execution place of the Scottish Independence leader famously depicted in "Braveheart."

A hermit's tiny cell built into the cliffside that saved him in South Pembrokeshire.

One of the oldest and certainly best preserved Cistercian abbeys still in existence.

This secluded walkway overlooks a magnificently wild London green space.

This beautiful Victorian ironwork masterpiece was built to keep London from smelling like poop.

An small and easily overlooked archaeology museum chock full of Egyptian artifacts.

Mary Kelly was last seen here before she was murdered by Jack the Ripper.

A network of concealed passageways lies within a busy London Underground station.

A historic London cemetery now serves as a nature park incorporating gravestones & memorial statues.

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

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