This narrow Ghent alleyway is an officially sanctioned street art tunnel.

For half a century, this Arabian-inspired retro café has been an oasis for locals in Okinawa’s central tourist area.

The birthplace of Japanese coinage.

Though it won't take you far, the wood train housed at this station is the last of its kind in Japan.

Dating back to the early 12th century, this is the first Augustinian priory established in England.

This remote museum highlights the island’s impressive creative legacy.

A far-flung tidal inlet off the coast of Maine produces some of the state’s tastiest oysters.

More than a millennium's worth of municipal records preserve the political history of Austria.

In the middle of a Vienna square, Roman ruins dating back some 2,000 years are on display.

An ornate private entrance to the Vienna subway built specifically for the emperor.

An exquisite Baroque church in Vienna's old town.

The solemn exterior conceals an opulent interior of this 17th century church.

Giant WWII fortresses that fired 8,000 rounds a minute, now home to thousands of pigeons.

A neo-Gothic church built to thank God for saving the Emperor of Austria from an assassination.

Op-art architecture designed for happiness.

Dine amidst exotic plants at this former royal greenhouse.

A spherical "micro-nation" in the heart of Vienna.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.

Designed by Gustave Eiffel before his famed tower.

The private train station King Leopold II built for the Belgian royal family now lies abandoned.

Established in 1638 to battle the Black Death, this botanical garden is a treasure trove of rare flora.

This bird-loving brewery is situated in an old municipal bathhouse, nestled beside a 300-year-old windmill.

Old ships and machinery fill a historic harbor in the city that's home to Europe's largest port.