During her hunt for the Egyptian queen’s lost tomb, National Geographic Explorer Kathleen Martínez uncovered the sunken ...

“We will continue searching on land and underwater,” Martínez said, adding that she feels finding Cleopatra’s tomb is “a matter of time.” Cleopatra’s Final Secret premieres September 25 on the ...

The Hranicka Abyss is at least 1,325 feet deep, and likely goes down further. — -- A team of explorers believe they have discovered the deepest known underwater cavern the world in eastern Czech ...

A National Geographic Explorer's search for Cleopatra's tomb got a big breakthrough. Kathleen Martínez has spent the last 20 years searching for the lost tomb of Cleopatra. Her work is part of a new ...