It's unclear if the Knights Templar created the secret tunnel in Acre, Israel, as an escape route or a way to secretly export valuable items. One thing is certain: It's a remarkable showcase of their engineering.

The scuba spider is the only arachnid to live exclusively underwater, despite lacking gills. Its secret, like its name suggests, is a makeshift oxygen supply.

It's unlikely that Hank Aaron would have achieved his baseball milestones were it not for one trailblazing pioneer who led the way: Jackie Robinson. Here, the baseball legend himself talks about Robinson's influence.

Young accordion phenom Yeime Arrieta Ramos is the first female accordion player to ever win the Vallenato Kings Festival.

David Hockney considered photography a lifeless medium--at least compared to a drawing or painting. But a photographic experiment yielded a completely unexpected, and transformative, result.

The Super Guppy is a one-of-a-kind mega transport plane that's been involved in moving aerospace hardware crucial to nearly ever major NASA endeavor, from the Hubble Space Telescope to Skylab. Now it's time for the bizarre aircraft to get a check-up.

Along the edge of the 44,000-acre Denikan Reserve, two black leopards will make their way to their newly built enclosure. These expert climbers won't be able to scale the specially built fences that border their sanctuary, but luckily they have plenty of stimuli to keep them from growing bored.

There aren't many rumors that American socialite Wallis Simpson hasn't been subjected to. So here's how she actually infiltrated the British monarchy.

In battle, mealtimes for the HDMS Peter Willemoes are tightly orchestrated affairs. The 160 person crew is divided into three teams, and each team has only six minutes to eat their meal.

The Dolmabahce Palace is the ultimate Rococo monument, flaunting the power of the Ottoman Empire. But lavish ornamentation comes at a high cost: the structure propelled the administration toward financial collapse.