Key West has a nature trail- it's through a shady mangrove area and ends up on the beach. Sounds nice. But actually rather than enjoying a pleasant walk, you get a swampy trek across the back yard of a condo building.
There's nothing to see but some mangroves which around here are like weeds. You can also spy on what's happening on people's balconies which overlook the wooden walkway. It would just be a cool little pathway to the beach but for the fact that whoever made the trail announces its presence with a glorious official-looking sign that promises much much more than it delivers.