This hauntingly beautiful cemetery outside a medieval citadel is full of winding paths and ivy-covered graves.

The ancient Greek Titan guards this massive dam holding a lightning bolt to symbolize electricity.

A Romanian church built from one single oak.

A medieval church built up to defend its village.

Known as the Hintz House, this medieval pharmacy has been an apothecary's haven for nearly 450 years.

This Romanian village may have been drowned, but it is long from forgotten.

The Natural History Museum that time forgot.

One of the oldest churches in Romania is believed to have been built on the site of a pagan temple.

This once-derelict building is now one of the most beautiful bookstores in the world.

The romantic botanic tunnel feels like a well-kept secret.

The first modernist church in Europe.

An IT-specialist-turned-farmer reintroduces an Austrian food tradition while promoting snails as a sustainable "future food" option.

Physicist’s epitaph provides final confirmation to a career of turmoil.

Vienna's diversity-themed traffic lights were inspired by the Eurovision Song Contest.

A neo-Gothic church built to thank God for saving the Emperor of Austria from an assassination.

Vienna's underworld of tunnels and subterranean rivers made an iconic appearance in a 1949 Orson Welles film.

Collection dedicated to funeral rites, equipment, and mourning rituals of the Viennese.

This museum promotes informed contraception by documenting its often secret past.

Beautiful Austrian natural history museum with carved ceilings and row after row of ancient taxidermy.

The resting place for anonymous victims of the Danube's dark waters.

This former insane asylum now holds a pathological anatomy museum.

Macabre museum devoted to historical Viennese murders.

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

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.