The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

Rare documents, old instruments, and gruesome specimens showcase the history of military medicine.

Perhaps the tiniest sculpture in Saint Petersburg is a little bronze finch inspired by a song.

A 250-year-old timepiece-automaton adorned with golden mechanical birds, which still sing to this day.

Palace where the nearly un-killable Rasputin was murdered.

A uniquely authentic display of traditional Russian culture.

A small part of Russia that does not touch any other part of Russia.

An unusual abandoned church damaged in World War II sits in a small village outside Moscow.

A former military outpost of Ivan the Terrible, the 16th-century church contains some of the rarest examples of Eastern Orthodox mural paintings.

A city block packed with whimsical sculptures that seem to be plucked from a tiled fantasy world.

This ancient village and its adjoining cemetery have a beautiful history of death and remembrance.

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

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

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

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

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

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.

Religious structure known for its sculpted details.

Climbing to the top of the cathedral's bell tower offers sweeping views of these medieval ruins.

This enormous abandoned prison was once dubbed the "Bastille of Romania."

A Romanian church built from one single oak.

A medieval church built up to defend its village.