Twenty castaways will compete in a tribal battle of the ages on "Survivor: Nicaragua" this fall.

For the last 10 years, "Survivor" has traveled to the farthest corners of the planet and subjected over 300 contestants to the harshest environments.  As the next decade of "Survivor" begins, this new group of strangers will compete on "Survivor: Nicaragua."  

The castaways will be marooned in a land of smoldering volcanoes, wildlife and impenetrable terrain.  They will be forced to work together to adapt to their new surroundings, yet compete against each other to the stay in the game or be voted out by their peers.  In the end, only one will remain to claim the million-dollar prize and title of Sole Survivor.

These 20 castaways will be divided into two Tribes of 10 comprised of older competitors and younger competitors.  The Espada Tribe, made up of individuals over the age of 40, must prove they have the life experience and knowledge that will ultimately help them Outwit and Outlast their younger competitors.  

The La Flor Tribe, consisting of individuals ages 30 and younger, will have to use their youth and vitality to Outplay and ultimately Outlast their elders.  

The series premieres on a new night, Wednesday, Sept. 15 (8-9 p.m., ET/PT) on CBS.

Check out some close-ups of some of the cast: