We had a guide take us on a 2-1/2 hour, 18 mile trip down the Belize River in a canoe. This was a great way to really get into the dense jungle. Also, since a canoe is relatively quiet, you won't scare the animals away. So a canoe trip is a good oppotunity to see some local wildlife.
Please see my travelogues for more photos of our canoe trip!
We rode horses up into the jungle. Never leaving the Iguana Creek Resort property, we rode and hiked for 3 hours.