This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

This elegant arc of a waterfall marks a religious turning point.

Iceland's largest lagoon is home to stunning multi-colored icebergs.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

Medicinal spa created with the discharge from a geothermal energy plant.

This sculpture celebrates a boules tournament and the link between Leeds and its twin city Lille.

The name of this suspended sculpture is Latin for "high horse," which is exactly what it is.

This sculpture of Edward of Woodstock is surrounded by eight Victorian lamp bearers.

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

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

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

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

Romania's triumphal arch looks out over Bucharest.

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

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

Instead of solid circles, the stoplights in this northern Icelandic town have glowing red hearts.

Edinburgh's oldest statue hides within a parking lot behind the city's iconic cathedral.

A statue in the heart of Edinburgh honors a bear that served in the Polish military during World War II.

A succession of eerily contemplative iron figures lead from a Scottish museum to the sea.

A beautiful Greco-Roman structure houses a well once believed to have healing powers.

This five-foot-tall bronze bird is a memorial to a species that was hunted out of existence.

Iceland's largest geothermal mud pool is a little bit haunted and a little bit dangerous.

Walk in the footsteps of the gods and straddle two tectonic plates.

This eye-popping Icelandic crater lake is surrounded by red volcanic rock.