Commercial airplanes land mere feet over the heads of sunbathing beachgoers on this tiny island.

Go inside to really appreciate this 500-year-old technological masterpiece.

Venice's island of the dead.

A dismembered holy head stares out from her beautiful reliquary at the St. Dominic Basilica.

These medieval skyscrapers dominate the skyline of this small Tuscan town.

A lover's walk between hilltop towns, decorated with graffiti love notes.

Milan's duomo is covered in beautiful carving including a curious "dinosaur-like" beast.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

Site of a classic 19th-century physics experiment to prove the earth is rotating.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

Hear the quietest sound from across the dome.

Giant, friendly pelicans in Central London, the most unlikely of places.

One of the few standing Roman lighthouses and a labyrinth of tunnels are a couple of the secrets at this historic castle.

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

Famously misunderstood wonder of the ancient world

Fascinating town where normal life interfaces with the occult.

The picturesque birthplace of Icelandic democracy is drenched in the blood of its brutal past.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

Medicinal spa created from the mineral-rich runoff of a geothermal power plant

Three columns of volcanic rock shoot out of the ocean.

The highest paved road in North America winds its way up Mount Blue Sky in Colorado to an altitude of 14,130 feet above sea level.

The largest source of fossilized insects anywhere.

Abandoned silver mine strewn with wrecked and twisted structures.