Once a beautiful palace, this structure is now known as the ''museum of destruction."

Once a bridge over the River Begej, now high and dry.

Backwards hour and minute hands and a timing mechanism that fluctuates with the temperature led to this clock tower's local nickname.

Structure built from the skulls of vanquished foes.

This fresco-covered medieval monastery hangs from the side of a steep cliff.

The oldest church in Serbia was also the ecclesiastical seat of the region during the Middle Ages.

Abstract monuments express sorrow and resilience at the site of a horrific massacre in Nazi-occupied Serbia.

Near Belgrade, an ancient-looking sarcophagus serves as a World War I monument.

Nikola Tesla's ashes are held in a golden sphere, surrounded by his works.

A museum dedicated to the former country.

Destroyed Serbian army headquarters sits half crumbled in a largely revitalized Belgrade.

A towering spire in the fortress of Kalemegdan honors the victorious armies of Serbia during their struggles against the Ottoman Empire.

A small memorial to a deadly night in Serbia that shook the world before it was swept under the rug.

A pair of connected skyscrapers form this symbolic gateway.

San Gennaro, the patron saint of Naples, greets pedestrians between these narrow city streets.

These "anatomical machines" are only one of the many strange items in this Italian crypt.

Artistic tombs, monuments, and a beautiful "Hall of Fame" lurk inside this cemetery.

The secret medieval communication system will whisk your words above the noise of the crowd.

Claude Monet immortalized this medieval bridge in two of his paintings.

An Orthodox church built by the Royal Family for the Russian community exiled to the French Riviera.

One of only a handful of seaside temples in Korea, this sacred space is home to a legendary healing Buddha statue and a traffic safety prayer pagoda.

Originally built by Japanese fishermen, this historic neighborhood has withstood the test of time.

The burial ground of two kings and a queen is now a calm city park in the middle of bustling Seoul.

An impactful museum ensures notorious war crimes disguised as "medical experimentation" won't soon be forgotten.