Caribbean Costa Rica:
The least visited region of the country, owing to its relative isolation (and mosquitoes), which has great opportunities for whitewater rafting and sea turtle spotting.
Central Valley:
The population center of Costa Rica.
Central Pacific:
Home to the lion's share of Costa Rica's beaches.
Guanacaste:
The "dry region" of Costa Rica, with few rains any time of year, fabulous beaches and surfing, and some large volcanic and dry forest parks in the North by the Nicaraguan border.
Plains of the North:
A sparsely populated, but beautiful and mountainous region, most famous for its active volcano, Arenal, and the surrounding hot springs and volcanic lakes.
South Costa Rica:
Enter the Costa Rican rainforest; one of the most biodiverse environments on the planet, full of exotic endemic flora and fauna, and some of the planet's most beautiful and remote tropical beaches.