Maurer IV was a planet near the edge of the Badlands. The planet was a jungle planet about an hour at warp from Deep Space 9. No dangerous indigenous animal life lived there, but there were natural dangers including tar pits.
In 2373, Miles O'Brien, his wife, Kira, and Jake Sisko went to explore the planet on a botanical expedition, but ran afoul of a Romulan / Maquis alliance organized by Tomalak and his son Narak. (DS9 comic: "Public Enemies, Private Lives")