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

17th century palace once a meeting place for politicians.

This memorial to the victims of the Romanian Revolution of 1989 is often compared to a potato on a skewer.

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

This Transylvanian church has changed its denomination four times.

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

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.

One of the most controversial statues in Romania is an emperor with no clothes.

A memorial museum to the political prisoners who were held at Sighet Prison, once one of the most feared places in Romania.

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

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

The growing stones of Romania.

Romania's triumphal arch looks out over Bucharest.

Check out engineering marvels of the past at this unintentionally retrofuturist museum.

This eccentric folly house was designed by Romanian thinker Bogdan-Petriceicu Hasdeu, with a helping hand from his deceased daughter's spirit.

A Romanian church built from one single oak.

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

A medieval church built up to defend its village.

Something's watching you.

This snug medieval lane is one of the narrowest streets in the world.

This bone-filled cave got its name after they found 140 bear skeletons inside.

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

Romania's only crater lake with water as pure as if distilled.