This statue is dedicated to the animal cosmonauts that perished during space flight experiments.

This Paleolithic cave may be the oldest cemetery in North Africa.

An eccentric garden of sculptures crafted in India decorate an Irish green space dedicated to Alan Turing.

A unique seaside cave where Aleister Crowley faked his own death.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

The verdant mossy ruins of a Franciscan monastery lie in the remote Sintra hills awaiting exploration.

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

This little-known national museum houses over 40,000 works of art from across the world.

This charming candle shop has been in business since 1789.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

The world's oldest bookshop still in operation.

Ring the bell to enter a bar that looks equal parts museum and old curiosity shop.

These "bridges" help confused bats cross the road.

Abandoned railway line circling the city of Paris.

Remnants of cone-shaped fascist bomb shelters in Milan.

An exclusive waiting room built for the royal family in the 1920s is hidden in Milan’s central station.

An ancient Scottish rock formation said to be the gravesite of a giant remains ensconced in legend and intrigue.

A strange rock with a sinister reputation lurks within the crimson waters of this Scottish glen.

"Respectful to the dead, safe and sanitary to the living, dedicated to the Genius of Memory..."

Northern Ireland's Brobdingnagian stepping stones.

A hands-off space for graffiti artists to hone and display their skills.

A vast overgrown cemetery, once known as one of London's "Magnificent Seven."

This pirate-broadcasting-tower-turned-restaurant played a rebellious role in the history of Dutch television.

Famed for its pie, this eatery has a hidden tunnel that allowed Catholics to secretly walk to church during the Reformation.