Your archetypical “rain forest” comes in many flavors, one of them being cloud forest. Monteverde, “green mountain,” is a cloud forest biological reserve near a small town in the mountains of Costa Rica. Although we are several thousand feet above sea level, and far inland, you can still see the Pacific, even on a cloudy day. General impression is that it doesn’t exactly rain all that much here (it is the middle of the dry season), but the clouds that roll over the mountain brings in a more-or-less constant drizzle over the dense canopy.
This cloud forest is anything but jungle, as “jungle” in the biological sense refers to the impenetrable brush that grows once you cut down the forest. The “wall” of stuff at the edge of the forest on the left in the picture above is pretty telling.
In mature forest, forest that hasn’t been cut a long time ago, the canopy shades the ground, which means that it’s pretty open down by the trail.