After visiting hours, this picturesque waterfall is essentially turned "off" to be used for hydroelectric power.

Hundreds of intricately carved Armenian stone crosses can be found within this huge cemetery.

This modern tandoor eatery was once a canteen for Soviet farmers.

The observation point offers spectacular views of the ruins of an ancient Armenian capital.

The ruins of a medieval monastery built on a perilous slope.

Different sections of the Zemun Fortress were built in the 14th and 15th century as a response to the advance of the Ottoman Empire.

In the hinterlands of Serbia's capital, a giant reflective mushroom houses an aeronautical history of the former Yugoslav republic.

A museum dedicated to the former country.

The decaying remains of a once-luxurious Soviet spa town.

Small church on top of a huge rock column.

A literally moving statue of stacked metal giants just continually trying (and failing) to find love.

Rock-hewn monastery complex with hundreds of cave structures tucked away into the mountainside.

Invented in the mid-19th century, this machine could send copied images via telegraph lines.

Just across from the "Last Supper" painting is the famous painter's vineyard, a gift received for creating the masterpiece.

The enigmatic sculpture hides above an escalator in a Milan metro station.

Long-abandoned art nouveau baths beneath Milan's Piazza Oberdan.

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

This centuries-old Italian chapel hangs midway down a sheer cliffside.

This winding road through an Italian canyon may be the most scenic drive in the world.

A museum dedicated to traditional Armenian clothing and their designer.

This medieval manuscript collection has some of the most obscure and ancient texts in the world.

A small but charming botanical garden that contains many exotic plant species.

Building owners can take out tiles for free at this repository for historic building materials.

This enigmatic artifact remained buried in a churchyard for years.