Notorious artist squat renovated into legal studios.

This centuries-old wooden wonder was built in less than a year and is one of Europe's largest timber-framed churches.

Beautiful views and Roman-style statues on the Italian coast.

This seaside Italian village doesn't just look Escher-esque, it actually inspired the mind-bending artist.

According to the legend, this structure was built in a single night with the help of the devil.

The construction of a new church near Venosa was started in the 11th century, but never finished.

Also known as the Temple of Poseidon, this is one of the best-preserved Greek temples in the world.

Crossing this suspension bridge feels like walking through the sky, a fitting tribute to the head of the Apollo program.

This small but lovely sinkhole lake is the last remnant of a great prehistoric water basin.

The pristine waters crossing this forest form a hidden waterfall among the dense vegetation.

An Italian hillside ghost town.

The steel cable lets adventurers zoom between two mountain towns at speeds of up to 75 miles per hour.

A steel paper plane is all that remains of a crashed aircraft that caused an amazingly small amount of damage.

Sound travels strangely in this underground whispering gallery.

Stockholm's deepest subway station is also a stunning ecological wonder.

An ancient Viking runestone hidden in plain view in Stockholm's old town.

A hidden bathhouse in one of Stockholm's oldest and busiest neighborhoods is open to anyone who can find it.

A heated statue pays tribute to one of Sweden's great actresses.

This gem from the industrial age helps visitors and residents alike traverse hilly Stockholm.

The world's largest model of our planetary system.

The world's largest bamboo labyrinth is a living demonstration of the plant’s immense potential.

A rambling museum which honors the beauty in everyday objects.

Italy's curious field of mud volcanoes is named for being both gross AND salty.

Catering to broken dolls for almost 200 years, this repair shop is now a charnel house of doll parts.