The Habsburgs' royal collections of art and wonders.

The beautiful baroque library of the Hapsburg empire.

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

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

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

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

The preserved arm of a third-century sorcerer is believed to have the power to lift curses and spells.

The bust of Romania’s most notorious ruler, Vlad Dracula aka "Vlad the Impaler," keeps watch over the ruins of his medieval court.

This solitary monastery may hold the remains of Vlad the Impaler (but probably not).

Once an opulent Art Nouveau hotspot, the Constanța Casino is one of Romania's most beautiful abandoned buildings.

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

This elaborately decorated, fairytale-like Romanian royal palace is one of the most striking castles in Europe.

The possible imprisonment of Vlad the Impaler here earned the medieval castle its nickname, "Dracula's Castle."

A memorial dedicated to a tragic event during the Axis occupation of Greece.

The abandoned summer estate of the former Greek Royal Family.

One of the greatest collections of coins in the world is housed in the former mansion of an archeological pioneer.

The rocky remains of an ancient Greek forest.

Seventeen oak trees sprout from the roof and walls of this tiny chapel without any visual evidence of roots.

Local lore says two enemy dragons live within these breathtaking mountain lakes.

Two churches shoot bottle rockets at each others' bell towers in an unusual Easter celebration.