The majority of the museum's large collection is held in a storage space open to the public a few times a year.

The remains of the great moral philosopher reside in a university in London.

A castle in the Scottish Highlands has been continuously inhabited since the 1300s.

This huge concrete map of Scotland was built as a thank you gift from a Polish soldier.

The Florence Nightingale Museum is home to the famous nurse's most treasured possession: her beloved pet owl.

This Scottish manor house is a lush relic from the life of a literary great.

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

One of the few standing Roman lighthouses and a labyrinth of tunnels are a couple of the secrets at this historic castle.

This tiny little pool is said to be home to a malicious mermaid named Jenny Greenteeth.

The "Bridge Over the Atlantic" lets you cross the waterway in mere seconds.

One man spent 10 years building a spectacular section of road because no one else would.

This single-track road rewards brave drivers with stunning Scottish scenery.

A relic of Victorian grandeur hides beneath a busy South London road.

On this wooded path, a stained-glass window creates a spellbinding forest cathedral.

This macabre monument atop an ancient well gives a nod to a brutal episode in Scottish clan history.

Although it appears ancient and mysterious, the quirky folly was actually built 200 years ago by an eccentric estate owner.

This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.

The only fixed chain and post trail in Scotland snakes its way along the base of a towering seaside cliff.

A labyrinth hides in plain sight at each of the city's 270 Tube stations.

The fierce beast perches atop a pedestal marking where the historic City of London gates once stood.

19th century museum with an eclectic mix of curiosities, from Egyptian artifacts to items on archery history to the skull of the world's oldest horse.

There's an exclusive Beefeaters pub hidden in the Tower of London.

A perilous medieval road leading right into the sea.

A long, winding trek rewards you with a gorge so captivating it inspired a painting in the Tate.