28. Prairie / Savannah: The grass hides the fact that the land slopes down to a creek or seasonal rill. The grass gets taller near the water as the land drops, but the upper surface of the grasslands is flat and smooth (or as close as nature gets). The only visible sign of the water is the thin dark-green ribbon of grass amid all the pale-green or yellow. If you get into an encounter near the water, you have to deal with visibility-blocking grass in every square.
29. At sea: "Dark skies at night, sailor's delight. / Dark skies at morning, sailor take warning." You see a bank of clouds rising from the horizon and moving diagonal to your path of travel.
30. Grasslands / prairie: You see "the Black Hills" ahead. When you get closer, the color is actually dark green pine trees widely spaced. The weather changes somewhat (but noticeably) while you stay in the wooded hills.
31. Desert: You top a ridgeline and see a shallow valley with a string of oases in it. There is an underground river here. The river peters out near a salt flat on the "downhill" end - that area looks as if you drained the Dead Sea. The desert nomads may or may not be happy to meet you just here; the oases may be Top Secret or a holy site.
32. Mountains: You are following a path that zigzags up a valley. It finally reaches the high end. You are standing on a promontory that gives you a spectacular view back down the valley to the foot of the mountainside. Any village you passed before climbing the mountain looks ant-sized.
33. Mountains: you find the abandoned ruin of an old hermit's home. It may be a cave or a building. There may be something interesting squirreled away therein, or you may find a souvenier of the hermit's life, or the ruin may be just an empty shell. For an unknown reason, no wild beasts have moved in (that you can quickly find).
34. Mountains: You locate a 'hidden valley' which has no line-of-sight to the rest of the world. There are travel paths out; you just were on one, going the other way. Somebody might live here who likes their privacy, or it might be untamed wilderness.