Wow, I thought I might meet some resistance on this one! WAs attempting to find a cache last night and got within a couple of feet, according to iPhone, but thorns and brush were sooooooo thick, it was impossible to penetrate; hence, came away empty handed and will most likely have to visit this cache again in late fall or early spring.
I don't want to cut a swab through the forest, but as one answer states above, some caches are undoubtedly placed when the foliage is low. To get within a couple of feet and not be able to get a find due to wild bushes is surely disappointing.