We observed sulfuric deposits on rocks in streams, crystal formations around steam outlets, black, orange, and milky white water, and my sister even stepped in some kind of black muck that looked like oil! I love geology, and found this facet of the hike to be amazing.
TiTou Gorge is located at the trailhead, and we climbed in at a point where the water is being prepared to enter an aqueduct. Then we swam up the current through the gorge to the waterfall at the end. This is the same gorge that features in Pirates of the Caribbean 2. It is beautiful and reminds me of home. :)
While having company in town we visited a whole variety of other sites on the island. Champagne Bay remains a favorite for snorkeling. It is amazing every time I go, and features a large variety of fish, coral, and other sea life. It has become a 'must see' for any new friends or visitors we take around the island. There's even a portion of the water where there are deep vents under the sea to the sulfuric action underneath the earth's crust... which result in endless streams of little tiny bubbles that you can swim right through - like swimming in champagne!
Emerald Pool is another site we thoroughly enjoy. The rainforest path is easy to navigate, and the waterfall is super easy to access, including a beautiful view point of the pool from the trail above, and it is also available for taking a quick dip in the cool water... or if you are more adventurous you can jump off of the rock like I did!