Tieton State, Rimrock, Washington, a perfect spot for exploring in the XCub, the one I've flown the most in this sim by far.
The forests in this sim are absolutely glorious. The coloring of each tree is proceduraly generated based on the aerial imagery, so there are many thousands of different hues of greens through the trees, rather than just a single color, and it picks up on all of the "veins" of darker hues weaving and spreading patterns throughout the lighter-colored trees (different soil types, different levels of exposure to moisture and sun, etc.).