Scuba and snorkeling equipment rental, certification courses and boat dives along the Guanacaste coast. Based in Tamarindo.

Diving and adventure tours, based in Playa Hermosa. Describes destinations, with trip schedule and general information about the country.

Specialty instructors with a focus on marine biology, boat trips and equipment, based at Flamingo with diving throughout Guanacaste. Photos and description of dive spots, guestrooms.

Adventure guides specializing in Costa Rica and Nicaragua. Jungle river, birdwatching, sea kayaking, waterfall treks and surfing. Based in Nosara. [English/German/Spanish/French]

Local guided tours. Provides travel itineraries and holiday planning information. [English/Spanish/French/German]

Scuba expeditions with dive sites throughout the Guanacaste coast, equipment, PADI courses, choice of hotels. Also offers sailing and fishing tours, jet ski and ATV rentals.

PADI certified courses based at Playas del Coco. Includes detailed rates for dive trips, equipment rental, sailboat excursions. Also offers full vacation packages with choice of lodging and land excursions.

Specializing in scenic river trips on the Corobici River, in the Canas area, for birdwatchers and naturalists. Tours and prices.