Monteverde Cloud Forest Biological Reserve [1]: The sine qua non of a visit to Monteverde, this world-famous biological reserve is laced by nature trails fabulous for viewing quetzals and other wildlife.
Selvatura [2]: This activity center in Santa Elena has a canopy tour and other attractions, highlighted by the Jewels of the Rainforest Bio-Art Exhibition, a private insect collection that is one of the nation’s preeminent nature displays.
Las Pumas Rescue Center [3]: You’re guaranteed eyeball-to-eyeball encounters with all the big cats you’re not likely to see in the wild at this rescue center.
Río Corobicí [3]: A float trip on this relatively calm river is fun for the whole family).
Las Hornillas Volcanic Activity Center [4]: This walk-through active crater with fumaroles also has therapeutic mud pools you can actually bathe in.
Palo Verde National Park [5]: Bird-watching par excellence is the name of the game at this watery world best explored by boat.
Rincón de la Vieja National Park [6]: Magnificent scenery, bubbling mud pools, and trails to the volcano summit are highlights at this national park.
Santa Rosa National Park [7]: The finest of the dry-forest reserves offers unrivaled wildlife-viewing and top-notch surfing.
Links:
[1] http://www.moon.com/destinations/costa-rica/guanacaste-and-the-northwest/monteverde-and-santa-elena/sights/monteverde-cloud-forest-biological-reserv
[2] http://www.moon.com/destinations/costa-rica/guanacaste-and-the-northwest/monteverde-and-santa-elena/sights/selvatura
[3] http://www.moon.com/destinations/costa-rica/guanacaste-and-the-northwest/canas-and-vicinity/canas
[4] http://www.moon.com/destinations/costa-rica/guanacaste-and-the-northwest/canas-and-vicinity/miravalles-volcano
[5] http://www.moon.com/destinations/costa-rica/guanacaste-and-the-northwest/canas-and-vicinity/palo-verde-national-park
[6] http://www.moon.com/destinations/costa-rica/guanacaste-and-the-northwest/liberia-and-vicinity/rincon-de-la-vieja-national-park
[7] http://www.moon.com/destinations/costa-rica/guanacaste-and-the-northwest/the-far-north/santa-rosa-national-park