Beginning in Rio De Janeiro, Chris and Casey Keefer follow in the footsteps of explorer Percy Fawcett in their quest to find El Dorado, the lost city of gold.

Chris and Casey Keefer enter the Alaska Triangle to explore new leads into the 1972 disappearance of a Cessna airplane carrying government officials Hale Boggs and Nick Begich.

Eager to find out if giants ever truly walked the earth, the Keefer brothers follow clues deep into the Ecuadorian jungle and find a remote structure believed to have been built by giants.

It is rumored that a secret society was responsible for emptying the Confederate treasury of 9,000 pounds of gold and silver after the Civil War; now, Chris and Casey Keefer head into the Virginia hills to find the vanished Confederate treasure.

Casey and Chris Keefer trek through snow, slot canyons and rugged terrain in pursuit of a legendary Aztec treasure said to be hidden in the mountains of Utah.

In upstate New York, Chris and Casey Keefer try to track down the lost fortune of mobster Dutch Schultz; the brothers use Schultz's final words and newspaper articles to guide them to where the notorious gangster may have buried his treasure.