Some of the freshest vegetables in Seoul are grown in a subway station.

This temple contains what might be the world's oldest optical illusion.

India’s only Brain Museum displays over 200 fascinating ways that your brain might kill you.

Ancient traditions and surreal birdwatching come into sharp relief along one of the world's most polluted rivers.

Nineteen ancient rock-cut Buddhist caves can be found on the outskirts of Mumbai.

Unusual outdoor collection of sculptures.

Thanks to a bit of wordplay, seven auspicious stone cats guard this ancient canalside street.

A canvas of crops grow from vibrant red soil in this terraced farmland.

A Zulu warrior is buried far from home, near the very northern border of Zambia.

Scrap material from around Eritrea finds a new life at this outdoor market, where upcycling is a lifestyle.

The first memorial dedicated solely to the Black troops who fought for the Union.

The only surviving piece of a submarine said to be the most decorated vessel in U.S. history.

This family mausoleum is steeped in symbolism and looks more like a fantasy location than a grave.

A walk through the historic city center, under the streets of Seattle.

This mountain tram provides stunning views while hanging from a single, steel thread.

On East Burnside, a 24-hour vending machine distributes world-class pastries.

Shakespeare has been brought to life in this open air theater for the better part of a century.

A small wooden boat once owned by legendary actor Errol Flynn sits inside this Oklahoma gas station.

Thousands of mounted insects, and some live ones, hide within an otherwise ordinary shopping mall.

This old army installation has worn many hats throughout its history.

Like Stonehenge, but with boats and oodles more charm.

One of two giant blue cockerel statues erected with an intentional double meaning.

A Borgesian work of art that may blur the line between fiction and reality a little too convincingly.

Inspiring Herman Melville and Henry David Thoreau, Mount Greylock in western Massachusetts is the highest point in the state at 3,491 feet above sea level.