Behemoth Arena are Boss fight zone in Ghost Recon Breakpoint, and I have the honor to work on it with Clément Lavarenne, James Kingsbery and Alexandre Lutz. We work with the incredible team of LD: Arthur Sautel, Aurélien Grimont, Pierrick Haëm, Valentin Moracchini et Thibault Moulin.
The anthena tower was made by Félix Chamerois and the Behemoth drone by Sylvain Bouland

Here is Salt Marsh Biome at the northest of Auroa archipel. It a Swamp region.
The first Arena is a mangrove swamp in Sinking Country.
The last one is a PMC basement in a swamp of Fen Bog region.