As many dataminers had predicted, the Season 5 map features a large swatch of desert landscape where Moisty Mire used to be.
In its place we now have Paradise Palms, a sandy resort area complete with cactuses, tumbleweeds, and lots of palm trees.
It's likely that Paradise Palms is at least somewhat inspired by the tourist destination Palm Springs, California, especially given Epic Game's recent decision to plant a real-life replica of the Durr Burger in the California desert last week.