Buy your fish and have it cooked to order in this bustling, eight-floor seafood market.

Over 80,000 carved wood blocks make up one of the world's oldest intact Buddhist canons.

A remnant of Korea's colonial past lies forgotten in a hip neighborhood in Seoul.

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

A chilling monument to Korean patriots who resisted the Japanese occupation.

Various forms of phallic art decorate this hill in commemoration of legendary local tragedy.

The final resting place of a space program monolith.

A local student's chance encounter with Keith Haring led to the creation of one of Europe's largest murals.

Hidden beneath the streets of London is a secret subway that only carried mail.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

Hundreds of drawings left by the land's previous inhabitants remain mysterious.

A house carved into a rock in the 1940s.

This large, castle-like structure is hidden amid the mountains on the grounds of the Utah State Hospital.

An earthwork sculpture built by Robert Smithson in the Great Salt Lake only reemerges during drought.

Dig for your own trilobites in this goldmine of invertebrates.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

It's safe—and permitted—to walk across these twin natural sandstone arches.

A museum in rural Utah documents the history of the Japanese Americans who were forcibly relocated there.

Despite its name, this route in southern Utah offers a heavenly day trip.

One of the world's oldest and most massive living organisms is a grove of quaking aspens.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.