Costa Rica Expeditions. The most experienced ecotourist outfit in Costa Rica specializes in customizing countrywide nature tours led by expert, bilingual, local naturalist guides. 2521–6099; www.costaricaexpeditions.com. From $1500 per person for a 7-day trip.
Horizontes Nature Tours. This expert ecotourist company arranges small-group and custom tours with naturalist guides and ornithologists, including nature-photography tours. They can also offer guided day trips to Corcovado National Park, cultural tours in Puerto Jiménez, or volunteer opportunities with a sea turtle rescue organization. 2222–2022; 888/786–8748; www.horizontes.com. From $1500.