A modern-day Lascaux cave underneath Paris.

Rare and strange weather predictors, from mercury barometers to leech prognosticators.

The ghosts of Britain's telecommunication past sit rusting away in a small village in England.

A churchyard in Ardsley houses a memorial dedicated to the victims of England’s worst mining disaster.

Hundreds of years ago, this lion-shaped door knocker could help a person accused of a crime find temporary safe haven in Durham Cathedral.

This cauldron was said to be hidden inside a church after it was borrowed from a local witch.

A monument to one of the most famous modernist Chinese poems and its poet.

Exquisite carvings of leaves, Green Men, and the occasional dragon adorn a medieval chapter house.

A tribute to an explorer and naturalist often overlooked by history.

Chelsea's soldiers were given strict orders when crossing this historic bridge.

This lonely bronze walrus celebrates a character in a Lewis Carroll poem.

This tower was created by the area's vicar as a shelter for exhausted travelers, complete with a fireplace and breathtaking views.

This charming English house was once the home of England's most famous poet.

This Victorian graveyard in Leeds is a macabre collection of beautiful tombs and memorials.

One of the oldest trees in Britain may have been witness to some of the country's formative moments.

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

One of the greatest movie directors of all time lived and worked in this London flat from 1926 to 1939.

The first geometric self-supporting spiral stairs in Britain are a truly beautiful sight.

A fantastic castle rumored to be the birthplace of King Arthur.

One part local history, 99 parts gruesome haunted house.

This abandoned bridge over the River Irvine may be the oldest surviving railway viaduct in the world.

A memorial dedicated to a boating accident that was bringing troops back home from World War I.

A rotating cast of guys and dolls in front of a Washington, D.C. building.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."