The vast, legendary catacombs hold secrets much stranger than stacked bones.

Uh, pardon me, ma'am, but I couldn't help noticing that there's a Columbo statue in the middle of Budapest.

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

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

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

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

17th century palace once a meeting place for politicians.

This Transylvanian church has changed its denomination four times.

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

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

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

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

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

Romania's triumphal arch looks out over Bucharest.

A medieval church built up to defend its village.

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

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

Something's watching you.

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

Romania's "Red Ravine" is a little-known natural wonder that bears a resemblance to the Grand Canyon.

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

No one knows who built this strange cave of worship or exactly why.

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.