"Medieval" castle built in the mid-20th century by one family.

One of Hungary's most influential places of learning is also home to one of the world's most beautiful libraries.

A 13th-century convent where St. Margaret of Hungary spent her teenage years.

Some of the greatest minds in the history of Hungarian art and science converged in this café.

The remains of an entire Roman city can be explored in this interactive museum.

Hungarian self-built castle.

A two-way chairlift system between Zugliget and the highest point in the city.

One of the largest barracks of the Austro-Hungarian monarchy's military is now an abandoned ruin.

Late at night, the bust of the "Dracula" actor was snuck onto the facade of this Budapest castle.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

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

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

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

A 19th century artistocrat's mansion, turned into a library, hidden in a modern library.

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

Home of the first female Hungarian poet, where her secret writing lay hidden for over a century.

This 11th-century structure is one of the oldest churches in Romania.

Once the legendary capital of the Dacian Kingdom, this city has been reduced to mere ruins.

Nine centuries-old fortresses guard the walls of this medieval Romanian city.

A Romanian church built from one single oak.

A medieval church built up to defend its village.

A fire once nearly devoured this gorgeous 14th-century Gothic cathedral.

Gigantic Romanian salt mines used to heal respiratory conditions.

The European towns of Brașov and Râșnov each have proud signs reminiscent of the Hollywood sign.