Giant topiary dog once played a role in a terrorist bomb plot.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

Eat the ultimate iteration of Portugal's most beloved pastry.

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

Thanks to an acoustic anomaly, this unassuming stone bench has heard one hundred years of secrets.

Small-town scandal, transformed into timeless pop art

One of the oldest and largest wooden churches in France was very evidently constructed by shipbuilders.

This mountaintop mariner’s church is packed with model ships and nautical art while hosting an annual maritime festivity for the townsfolk below.

An underground city of ancient quarry tunnels hid thousands of Allied soldiers in WWI.

A centuries-old complex of hand-dug stone chambers has sheltered locals in times of trouble.

The site where one of the most famous poems of World War I was composed is preserved to honor the legacy of the work.

This memorial museum chronicles the apocalyptic destruction of the First World War.

A moving memorial to the fallen and missing from WWI trenches.

While you wait to cross the street at a traffic light in Mainz, you might notice that the light is staring back at you.

This Stone Age solar temple aligns with the sun on each equinox and solstice.

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

The fishing boats that moor in this small lagoon enter and leave through a tunnel to the sea.

The floor of this spectacular Baroque sanctuary is covered in memento mori.

This spectacular dome managed to survive after being bombed in World War II, in an event known as the "Miracle of Mosta."

The Jesus tree of Malta bears a striking resemblance to Christ on the cross.

An abandoned set from the 1980 film "Popeye," claimed and repurposed as a theme park by creative locals.

The ghost town where the villagers refuse to leave.

Charles Dickens was not a fan of the ghastly wall dressings in this 6th century church.

This one has sailed five times as far as Sir Francis Drake's famous ship.