A tiny microvalley etched into the side of Knocknarea Mountain hides another world.

An eccentric garden of sculptures crafted in India decorate an Irish green space dedicated to Alan Turing.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

This Romanian village may have been drowned, but it is long from forgotten.

According to a gruesome legend, an architect sacrificed his wife to build this spectacular, 16th-century cathedral.

Visit an imposing 13th-century Transylvanian citadel lurking not far from the region's more heavily touristed attractions.

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.

A medieval church built up to defend its village.

Romania's triumphal arch looks out over Bucharest.

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

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

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

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

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

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

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."

This massive underground salt mine now holds a sci-fi theme park in its depths.

This fairy-tale castle would make Dracula (who is said to have been imprisoned there) jealous.

Though an earthquake destroyed this village in 1980, one former resident still walks its streets every day.

A former mining village that now operates as an open-air museum.

A series of tiny artificial islands rich with produce bob atop the surface of the lake.