Where is the best place for a tropical cycling vacation?

I want to go on a road and mountain biking vacation in the tropics. What do you recommend?

Feb 27, 2012
Outside Magazine

Turrialba, Costa Rica
The tiny town of Turrialba, about an hour east of San Jose in the Central Valley, is the inland adventure capital of Costa Rica. Though most people think of it as a whitewater rafting hub for the roiling Pacuare and Reventazon rivers, it’s also mountain biking central. Serendipity Adventures custom-plans mountain biking trips for all levels, on everything from dirt plantation roads to snaking singletrack on the flanks of the rumbling, and still very much active, 5,400-foot Arenal Volcano. Their nine-day mountain-to-Caribbean tour starts at $3,000 per person. Banana Adventure Tours operates a five-day all-inclusive biking, hiking, and rafting tour through the area starting at $1,000 per person.