Favored Terrain (D20 Modern Feat)
From D&D Wiki
Favored Terrain (type)
Through experience or special training, you favor one type of terrain.
Prerequisite: Survival 4+ ranks.
Benefit: Choose one type of terrain from the following list: arctic, desert, forest, jungle, mountain, or swamp. When in this terrain, you gain a +3 competence bonus on Survival checks and any cover bonuses to Defense you gain are increased by +1.
Special: You may take this feat multiple times. Each time you take this feat, it applies to a different terrain.