We arranged for a guide to take us up the Indian River. The Indian River is a river that empties into the ocean at the heart of Portsmouth, and rowboats and guides will take you up the river to a "Jungle Bar" where some delicious rum punch is served. Our guide was excellent (despite being severely hung over) and picked us up at our hotel in Portsmouth in his motorboat. The jungle scenery was pretty, but as with the aerial tram, we didn't see any interesting animals.
There was some nice flowers, some fish in the water, and trees with roots extending into the water. Our guide told us one of the scenes of Pirates of the Caribbean 2 that was filmed on this river.