The big toe of this towering monument to a Croatian national hero is worn from years of superstitious rubbing.

A collection of items from a way of life that no longer exists.

This fairy-tale castle would make Dracula (who is said to have been imprisoned there) jealous.

The legendary cliffside castle of three-time Voivode of Wallachia, Vlad the Impaler.

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

Religious structure known for its sculpted details.

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.

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

A misnamed well, with a deep dark past.

This statue of the famed author, actor, and journalist is made entirely of screw-nuts.

A museum dedicated to the former country.

Dedicated to a brave pooch who fought a tiger to save a young child.

Romania's triumphal arch looks out over Bucharest.

This memorial to the victims of the Romanian Revolution of 1989 is often compared to a potato on a skewer.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

After sitting unused for decades, this abandoned communist infrastructure became a wildlife utopia.

The complex has been abandoned since the Croatian War of Independence, barring a stint as a set for 'Game of Thrones.'

Roman ruins top white travertine terraces formed by ancient hot springs.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

Its frescoes depict the likeness of Marshal Tito, Karl Marx, and Friedrich Engels burning in hell.

This virtually windowless mass of smooth concrete is the only Catholic church in the city.

No one is sure if the world's fourth-largest diamond had been found in a rubbish heap or was pawned by Napoleon's mom.

1513 Turkish world map, full of European state secrets and snarky commentary.