Numerical symbolism abound at East Asia's oldest observatory.

One of only a handful of seaside temples in Korea, this sacred space is home to a legendary healing Buddha statue and a traffic safety prayer pagoda.

A unique set of caves that spits waves back out into the ocean.

A unique work of automotive art calls this shopping center home.

This 14th-century temple is also known as the "Temple of the Golden Pavilion" for its gorgeous gilded reliquary hall.

A train ride to the middle of nowhere gives its passengers some of the most iconic views of Japan's seasons.

This watchtower once presided over the Berlin Wall.

This medieval castle was painted pink as part of a now-abandoned children's theme park.

Rich with fauna and flora, nature-lovers can walk across the sea at this UNESCO World Heritage spot.

Birthplace of the "Cat in the Cradle" and a cluster of iconic, original windmills that let the Dutch tame the seas.

One Portuguese poet described this cape, the westernmost point in mainland Europe, as "where the land ends and the sea begins."

A lush oasis full of vibrant plants and striking geometric displays.

Men in rubber-soled boots serve as your "brakes" on this toboggan ride Hemingway described as "exhilarating."

The patron of this extravagant Art Nouveau confection insisted that nothing less than a boat should project from its facade.

Europe's official "zero-level," the equator of elevation.

An old railroad grade built for the construction of Hoover Dam is now a recreational trail featuring several tunnels and sweeping views of Lake Mead.

A hidden church in a hidden courtyard tells the story of the Miracle of Amsterdam.

Amsterdam's former hotspot for public executions and dissections.

After being lost for decades, this striking mural depicting the atomic bomb covers the wall of a busy Tokyo metro station.

Japan's iconic sci-fi hero rendered to 8-bit by notorious French street artist Invader.

Once the site of the Hawaiian monarchy, this building was originally designed as a palace.

Perhaps the most spectacular grotto along the Algarve coastline.

The walls of Germany's Parliament still show the scars of the Red Army takeover in World War II.

A former reservoir that was only recently discovered after more than 60 years of disuse.