This short bridge is the only thing connecting a tiny Irish island to the mainland.

A subterranean playground in an abandoned slate mine.

Mysteriously stacked storefront paths give this medieval British town an iconic style like none other.

An alleyway plaque is all that remains of the independent Texas' envoy that forgot to pay their rent for over a century.

The signs of a long buried road can still be found hidden beneath a London sewer grate.

Wedged between two buildings at the Great Ormond Street Hospital is this secret music installation.

The longest hedge maze in the world.

A 30-acre garden inspired by the principles of modern physics.

This collection of illusory paraphernalia has been culled from the history of London's premier magician's club.

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

A curious carving hides on a marble column in the Mosque-Cathedral of Córdoba.

An independent naturist colony amidst 1000-year-old ruins.

A living art gallery painted on a canvas of Monterey pine trees.

Holy Grotto of Montserrat Monastery holds one of Europe's mysterious black Madonnas.

A huge cathedral single-handedly constructed by one eccentric monk.

Bacteria and algae give the salty water its bubblegum hue.

Bask in the 19th century grandeur of an eccentric Freemason millionaire's private gardens.

Cliffside houses provide a spectacular view from their perch above the valley.

An isolated village literally built into the crevices and rock formations of a mountain.

This cemetery features modernist statues as strange as its name.

A beautiful but toxic fountain of mercury.

The beautiful baroque library of the Hapsburg empire.

A Cajun-style Christmas on the river also involves sky-high pyres and explosives.

A Rodeo for Prisoners.