This enormous steel tube is the biggest speaking horn in the world.

This Transylvanian church has changed its denomination four times.

Romania's triumphal arch looks out over Bucharest.

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

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

This restored Portuguese cafe may well be the most beautiful place in the world to grab a Big Mac.

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."

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

This small chapel is built of human bones and decorated with a golden skeleton.

A 16th century chapel decorated with bones, skulls, and entire bodies hanging from the wall.

These clocks tell time in a theological sense.

Valletta’s outdoor theatre stands within the ruins of a 19th-century opera house.

Despite the name, these small saltwater swimming pools have nothing to do with the Romans.

This unique building in the main square stands out among the city's typically Baroque architecture.

This prison on the Maltese island of Gozo is almost 500 years old, and they have the graffiti to prove it.

This mountain trail inspired Nietzsche to complete his magnum opus.

Hilltop garden on the site of an old fortress overlooking the Mediterranean Sea.

This statue of the great Argentinian car driver is located near a famous curve of the Monaco Grand Prix.

This celebration of Latvia’s freedom and independence avoided demolition over half a century of Soviet occupation.