The oldest of its kind in the country, this tree sits where formerly enslaved people are said to have founded the city of Freetown.

Five ancient libraries, little changed for centuries, preserve a medieval archive of Quranic lore and civic documents

This remarkably well-preserved mosque stands amid an 11th-century caravansary.

A geological bull's-eye visible from outer space.

Thousands of colorful pirogues showcase ingenious craftsmanship at the largest fishermen port in Nouakchott.

The largest camel market in West Africa

The original resting place of Queen Cleopatra and Mark Antony's only daughter.

Sit at the "Disney table,” where Walt and his team of "imagineers" once dined on the regular.

An extraordinary final resting place full of oversized art, amazing statues, and dead celebrities.

An abandoned 1930s gas station turned bustling neighborhood park.

Southern California’s Theme Park Beginnings.

A bigger-than-life pun that has become a beacon of altruism.

Victoriana on Orange Grove Avenue.

An airy would-be solution to a housing shortage.

An unfinished tomb carved into a giant boulder in the Arabian Desert.

More than 100 monumental tombs carved into rock are preserved at this ancient Nabataean site in the Arabian Desert.

Lions carved into the rockface adorn these two tombs built into the mountains of Dadan.

There are eight natural springs around town, each with a slightly different taste.

The spot where the two men ate together now stands enclosed in glass.

The notorious "Hanoi Hilton" where Vietnamese colonial subjects and later American POWs, including John McCain, were imprisoned.

Twice a day a speeding train passes only inches from the homes of this residential neighborhood.

This striking otherworldly landscape outside Angola's capital city is the product of millions of years of erosion.

This horseshoe-shaped waterfall is the second-largest on the African continent.

Abandoned ships along a deserted beach feel like the set of a post-apocalyptic thriller.