Learn about 3,000-year-old Mayan civilization with a visit to Altun Ha, then go tubing in the Branch Rivera Caves during this 6-hour adventure from Belize City. At Altun Ha, walk through the two ancient plazas that once served as center of commerce for 10,000 Mayan residents trading jade and obsidian. With your adventure guide, hike 30 minutes to the entrance of the cave, then hop on an inner tube and float through the underground network of rivers. No experience is necessary; this activity is suitable for participants of all fitness levels. A traditional Belizean lunch with refreshments and round-trip transportation from centrally located Belize City hotels, the airport or the cruise port are included.