Shark Valley - Everglades National Park Professional Review and Guide
"Includes: Bobcat Hammock Boardwalk, Otter Cave Trail. Although Shark Valley is not as well-known as other regions in the park, its 15-mile long, hard-surfaced trail penetrating directly into the wilderness is a prime wildlife viewing area. However, be prepared to share it with lots of other people unless you arrive when the Shark Valley gates open at 8 A.M. Beginning on the hour, from 9 A.M. almost until closing, the park operates a two-hour tram ride along the road for less mobile visitors to see the birds, gators, deer, turtles, and other animals.
At the end of the road is a 50-foot high observation tower with a panoramic view deep into the Glades. The tram returns by a different road that parallels the first, so the scenery is totally different on the route back. Bikes also can be rented here, so hikers are bound to see quite a few other people. Most of Shark Valley’s visitors ride instead of walk, so don’t feel badly if you decide to join them."