Nature center, observation tower, kayak/paddleboard trail, several boardwalk trails, biking/hiking trails, boat ramp on the intracoastal, fishing pier, and a tour boat that takes you through the mangroves and West Lake. Pretty much all the classic Florida shit you desire.
As far as wildlife goes, I mostly see birds and crabs. The more you look out into the mangroves the more crabs you see. There are several boardwalk and paved trails, each leading to an observation area overlooking different parts of West Lake.
You can kayak or paddleboard into the park from a public dock in West Lake Park, located just across Sheridan Street. Dock your vessel on the small beach near the nature center and stroll around for a bit. There are several marked waterway trails leading through the mangroves between West Lake Park and Anne Kolb.
This shit is all free unless you pay the $2.12 to get into the nature center or thrown down a few bones to ride the tour boat. Very inexpensive day, nice area in an urban jungle ideal for escaping the hustle and bustle.