A series of caves under Castle Hill that once held the prisoner Vlad Tepes, better known as Count Dracula.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

Museum dedicated to the terror regimes of Hungary.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

This Budapest bar allows drinkers to leave their mark on the walls, floor, and even ceiling.

An exquisite Baroque church in Vienna's old town.

This series of Baroque passageways in Vienna's cultural center mix old architecture with modern art.

The solemn exterior conceals an opulent interior of this 17th century church.

On a winding Vienna side street, one museum has turned their windows into a monument to history’s peace-minded heroes.

Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.

Giant WWII fortresses that fired 8,000 rounds a minute, now home to thousands of pigeons.

Baroque celebration of the end of the Great Plague of Vienna.

This Austrian museum celebrates the work of famous forgers and their inimitable imitations.

The topiary maze at the Habsburg hunting lodge.

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

The beautiful baroque library of the Hapsburg empire.

This massive Brazilian church is built like an angular, technicolor pyramid left by Mayans from the future.

Try not to get lost in this picturesque Brazilian labyrinth of the dead.

A 125-meter long "tribute to the Brazilian people."

Plagued by riots, celebrity injuries and a tragic death, this amusement park has been demolished.

Beautiful public park off the beaten path and away from tourists.

This stunning Brazilian library contains the largest collection of Portuguese texts outside of Portugal itself.

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.