In Costa Rica, nature comes first

River runners rafting to Pacuare Lodge encounter easy Class 2 rapids getting there; and when they leave, heart-pounding class 4 and 5 rapids downstream. (Steve Haggerty/TNS)

Howler monkeys, kings of the rain forest canopy, are hard to see but easy to identify; listen for their loud throaty howls. Though nine species have been identified, Costa Rica is home to just one, the common mantled howler. (Steve Haggerty/TNS)

The luxurious Linda Vista Suites, high up in the rain forest canopy and with screened walls on three sides feels like being outdoors. (Steve Haggerty/TNS)

A half-hour’s hike from Pacuare Lodge leads to a hidden waterfall. (Steve Haggerty/TNS)

Keel-billed toucans, bright-colored and slow-flying, are easy to spot in dense rain forests like those in the Pacuare River gorge. (Steve Haggerty/TNS)

Hike through the grounds at Nayara Springs Resort and get lost in the landscaping, a green with tropical plants and flowers crowding every path, enhancing every pool and flanking every restaurant. Highlighted by fully grown trees, with bushes, flowers and even animals - large, strange birds and families of sloths - the botanical gardens are what make this luxurious, full-service resort so unique. Most plants are native species; all are identified by a common and scientific name. (Steve Haggerty/TNS)

TURRIALBA, Costa Rica — It was 6:01 a.m. when we heard them barking, an insistent “huh-huh-huh-huh” floating through the rain forest canopy and over Pacuare Lodge.