Secret North Korean passage discovered below the world's most dangerous border.

The most famous location in China was home to whole dynasties worth of imperial rulers.

Climb to the top of the world's largest seated bronze Buddha.

The final resting place of 19th-century sailors previously banned from being buried within Portuguese Macau.

This tourist village in Nairobi celebrates the traditional lifestyles and customs of Kenyan tribes.

Kenyan restaurant is a carnivore's paradise, serving exotic meats at its ultimate 'Beast of a Feast.'

Freddie Mercury's childhood home is now a monument to the iconic Queen rockstar.

After sunset the heart of Zanzibar's historic Stone Town neighborhood transforms into a culinary playground.

In Zanzibar, a historic 19th-century palace is a reminder of the world's shortest war.

This monument is a stark reminder of the horrors of the Zanzibar slave trade.

This slowly crumbling mansion was home to one of East Africa's richest and most powerful slave traders.

A memorial to the only dog ever officially enlisted in the Royal Navy.

This tiny, tranquil Senegalese island serves as a powerful symbol of the Atlantic slave trade.

Despite a fraught and controversial history this African island holds a powerful monument to the tragedy of the slave trade.

This series of rope-style bridges brings visitors into a jungle layer that is usually reserved for birds and monkeys.

Where thousands of slaves passed through the "Door of No Return."

An enormous public square and parade ground built to celebrate Ghana's independence.

Buried deep in the forest near Limbe, this little-known slave port became the point of no return for 10 percent of enslaved Africans.

The largest Christian church in the country is a complicated symbol of Spanish colonialism.

The world's most active stratovolcano is almost always erupting.

Deceased nuns were placed on stone chairs to decompose, while the surviving nuns prayed near the lifeless bodies.

A former Roman town that was once the home of Scipio Africanus.

Italy's "New Mountain" rose from the ground in a volcanic eruption in 1538.

A sulfuric hellscape in southern Italy.