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

Sealing couples' love since just after World War I.

An eerie, protected forest of old-growth oak trees, many of which are now dead.

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

A misnamed well, with a deep dark past.

Ride in 1960s style on the private luxury train Marshal Josip Tito used to travel around Yugoslavia.

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

An abandoned monument remembering the "Pančevo Holocaust" now stands as a shadow of its former self.

Curious carved stones and bird-like wings are a symbol of Serbian resilience and freedom on the site of a WWII massacre.

This symbol of Yugoslav liberation decorated with 620 carved heads of mythical creatures is now a forlorn relic of another time.

A grand Yugoslav memorial to the group of partisans who fought and died resisting western Serbia’s Nazi occupation.

This memorial park stands on the site of one of the largest mass executions of the Second World War.

This spaceship-like Serbian monument reaches for the stars in celebration of the fallen fighters of fascism.

A Serbian church lit by chandeliers made of weapons.

A Red Cross memorial museum at the site of the Niš concentration camp that operated for four eventful years during World War II.

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

A sinuous path among steep cliffs creates a stunning sight in southwestern Serbia.

Structure built from the skulls of vanquished foes.

The final resting place of the world's first nuclear reactor.

Now nearly abandoned, Kaskaskia was once the capital of Illinois and one of the most important towns on the upper Mississippi.

This deceivingly ordinary warehouse hides an enormous collection of pop culture treasures.

One of the first historical sites of an alternative universe was installed in the town of Paris, Illinois—which is now home to an annual spelling bee of Kcymaerxthaereal words.

First known as the "Sample House," this construction mash-up was meant to be a living catalogue of building styles.

This cheerfully-named branch of the Chicago River is the fetid result of years of blood, entrails, and meatpacking waste.