To the northeast of the Central Valley, this region includes a large part of the provinces of Alajuela and Heredia, extending to the north to the border of the province of Guanacaste. The rains and cloudiness are characteristic of this zone throughout the year, nevertheless, from February to April there is a noticeable decline in the amount of precipitation and the number of rainy days. The whole region portrays an important economic growth due to its agriculture production and the surge of tourism, mainly in Sarapiquí, San Carlos (famous for the Arenal Volcano), and San Ramón. Each of these places offers special qualities that differentiate them and put them in a privileged position in the country.

Sarapiquí stands out for its primary forests, swamps, and plantations, in a biologically rich territory, with temperatures that oscillate between 26°C and 28°C; a hot, humid land which can be explored by way of the dense network of trails within the protected areas which are of great importance for the conservation of birds, butterflies, felines, insects and plants.

San Carlos offers a landscape of exceptional beauty with its forests, lagoons, fields of crops, rivers with hot springs, and the most active volcano of Costa Rica: Arenal. In other words, sanctuaries where one can breathe peace, purity and the majestic power of nature. The San Ramón section, famous for its tropical cloud and rain forests in the highlands, is noted for its variety of epiphytes, mosses and ferns, and is home to more than 225 species of birds.