An Antoni Gaudí masterpiece in Astorga.

This modernist bridge highlights the bear as a symbol of Madrid.

A thorough look at the development and history of the underground's rolling stock of the Madrid subway system.

About as hidden as can be, this specialty coffee shop is wedged between multi-story buildings at the end of a dark, skinny alleyway in Seoul.

This 317-ton walkable art installation is an homage to Korea's "City of Steel."

Once a resting spot for King Fernando VII.

The most impressive of Basel's three remaining city gates.

In this 400-year-old hotel in Madrid, you'll find a comb in every room, an old clock, and maybe a ghost.

Numerical symbolism abound at East Asia's oldest observatory.

This human-made pond is part of a Korean palace complex first built in the 7th century.

An early Korean refrigerator.

This tomb's name derives from a famous painting of a white horse found inside.

The 400-year-old remains of the samurai invasion of Korea.

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.

Originally built by Japanese fishermen, this historic neighborhood has withstood the test of time.

To enter the lower hall of this temple, you must first walk through a dragon.

This tiny museum immortalizes the birthplace of an iconic Chinese-Korean noodle dish.

This humble bench is considered the most beautiful in the world.

Designed by Gustave Eiffel before his famed tower.

An old quarry transformed into a recreational and cultural space.

The National Park Service’s best-kept secret with views that rival any in D.C.

Home to the largest artificial lake in Asia.

For more than half a millennia, this automaton has rung an hourly bell.

The world's longest bridge fountain has hundreds of nozzles that create a beautiful, illuminated spectacle.