On Sat, 29 Nov 2014 08:25:19 -0700, Tony Hwang
wrote:

Soon I am
flying down to Houston to embark on a cruise ship to visit
Honduras and Belize.

While in Belize, if offered as excursion, take the Cave-Tubing
adventure. Wonderful experience.

"...experienced Belizean tour guides, you will hike for about 30
minutes through the Belizean rainforest then tube down the refreshing
Caves Branch River and through spectacular cave systems, which the
ancient Mayas regarded as a sacred underworld and home to many
powerful gods. It's an exciting adventure you'll never want to end and
one you will always remember."

One Such provider:

http://www.cave-tubing.com/

If the same company we took, you have lunch in the rainforest at trips
end.