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

Pop culture has helped to keep this iconic British building from being destroyed.

An unassuming churchyard is the resting place of a pioneering surveyor and reluctant namesake of a mountain.

The abandoned funicular tunnel was a secret base for the BBC during World War II.

Eighty million natural history specimens call this gargantuan museum home.

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

Now isolated, this church was once the center of a bustling village that succumbed to the Black Death.

Hidden beneath the streets of London is a secret subway that only carried mail.

A student driver's nightmare.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

This foreboding medieval castle was twice besieged by barons rebelling against the English king.

The plaques around this 19th-century structure recall some rather strange tales.

Legend says the people of Wiltshire got their "Moonraker" nickname from this small pond.

The only pub in the world surrounded by an ancient stone circle.

The largest stone circle in the world has ended up bringing up more questions than it has answered.

This former Welsh metal factory is now a lovely abandoned relic but was once one of the industry's world leaders.

Go deep down into the earth to experience the world of Welsh coal miners.

Mounds, rune stones, and a 1,000-year-old church, left behind by Denmark's first two kings.

A small Denmark town displays a pair of titanic jaw bones as their community symbol.

The northernmost point in Denmark is a turbulent sandbar created by two clashing seas.

Visitors can sit and study the board with this Estonian chess legend and International Grandmaster.

This unique rock formation is quite the local celebrity, although one day it may come crashing down.

Visit a surreal landscape so otherworldly NASA actually used it to train the Apollo 17 crew.

The chefs at El Diablo use heat generated by an active volcano to cook the food.