This feat of Brutalist architecture is also known as the Three Sisters.

The ruins of a military-industrial complex now host concerts and more.

This natural spa is known for its healing properties and vibrant hue.

After this medieval Serbian fresco was hidden for centuries, an image of it became one of the first to be sent into space.

Housed in a 1912 architectural masterpiece, this outlet of the Golden Arches is a real beauty.

These natural stone bridges are the largest on the European continent.

Wandering this ancient burial place offers a glimpse of the afterlife in the fresco-adorned tombs of an ancient Etruscan civilization.

The ruins of this medieval tower are destined to crumble into the sea.

The martyr's wax-enhanced skeletal remains lie preserved in a glass case in the Santa Maria della Vittoria in Rome.

Dine amidst exotic plants at this former royal greenhouse.

A tropical paradise just a short trip from the opera house is filled with beautiful winged creatures.

The final resting place for the remains of 143 Habsburg royalty.

The beautiful baroque library of the Hapsburg empire.

This funeral home had the honor, if that is the correct word, of hosting the funeral of the famous Sacco and Vanzetti.

The former site of an all-but-forgotten colonial landmark is now remembered by an often overlooked bas relief.

This massive tea kettle was once a promotional stunt for the Oriental Teashop.

This giant Boston statue of Mary is standing on a globe to show her power over the universe.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

The oldest Italian café in Boston, this spot also serves as a veritable museum of vintage coffee ephemera.

One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

A beautiful Victorian-era cemetery, complete with a miniature village.

An enormous, inside-out glass globe built in 1935.

999 stairs lead visitors through a massive hole in a mountain known as the Gateway to Heaven.

The first Russian Orthodox church in the Catholic city of Rome in almost a thousand years.