According to the Guanches, the aboriginal people of the Canary Islands, the king of evil lives inside this volcano.

Two geological phenomena in one precarious locale: a towering stone window, and a deep blue void.

Stone Age solar temple is aligned with the sun on each equinox and solstice.

Burial grounds for more than 1,000 bodies deep under the modern town of Rabat.

Ancient mysterious ruts carved in the bedrock.

A musical instrument played by the sea.

A dead saint, a deadly poison, and a mysterious holy ooze.

Bridge that died in war and was resurected.

An ancient knight and a symbol of the city's freedom.

This South London cemetery holds the remains of more than 15,000 people.

Hear the quietest sound from across the dome.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

Largest lake in Great Britain measured by surface area.

This stately monument has been wearing a traffic cone hat for decades much to the delight of the locals.

The most loyal of little dogs, or a Victorian era publicity stunt?

Protecting the dead from opportunistic body snatchers.

A six-ton wedding present for the King of the Scots.

This modern French ossuary contains the jumbled bones of 130,000 WWI soldiers.

Site of one of World War I's most horrific scenes.

Historic medieval fortified city in southwest France.

Single runway interrupted by a busy road that cuts across its middle.

The oldest Roman lighthouse still in use.

The remains of an encyclopedic sculpture garden later used as an internment camp.

An accidental trick of light casts the perfect shadow of a pilgrim of the Camino de Santiago against the cathedral wall.