Reef and Rainforest Tours
- ATOL-bonded tour operator features natural history itineraries, tailor-made and small group trips also available.
- http://www.reefandrainforest.co.uk/

Raymond Wiggers, Guide and Educator
- Professor conducts geology and botany tours. Site has links to free geology and botany information, details about past and upcoming expeditions, and photo galleries.
- http://raymondwiggers.homestead.com/

Scientific Expeditions to Patagonia Organized by University of Connecticut
- Groundbreaking ecological research at Torres del Paine National Park, Magallanes, Chile. Details about past and future expeditions.
- http://www.canr.uconn.edu/paine/

Parawild Safaris
- Works with professional game capture specialists in South Africa.  Visitors can have an hands-on, educational experience while being a part of wildlife conservation in action.  Also offers traditional wildlife viewing, cultural safaris, and adventure t
- http://www.parawild.co.za/

Kayenta Scientific Investigations
- Information about geoscience tours in the Western United States.
- http://www.kayentasci.com/

Volcano Live
- Provides information about volcanoes, eruption, and volcano treks, and links to other volcano educational sites. Includes links to volcano-cams.
- http://www.volcanolive.com

Burren Hill Walks - Ireland
- Guided walks in the Burren region of Ireland on geology , botany and archaeology.
- http://homepage.eircom.net/~burrenhillwalks

Global Expeditions
- Expeditions to foster exploration, conservation, community and medical aid in remote areas, led by John Blashford-Snell of Scientific Exploration Society.
- http://www.ses-explore.org

Watershed Belize Field Course
- Describes watershed field course designed to experience travel through a tropical watershed in Belize; a journey from the Maya Mountains rainforest to the Barrier Reef.
- http://www.watershedbelize.org

Butterflies of Kerala
- Travel agency highlights tours and excursions to see the butterflies and variety of species in Kerala, India. Photos and description of itinerary available.
- http://www.butterflieskerala.com

Diamantina Outback Tours
- Offers expeditions based on natural history to remote regions of Outback Australia. Details of tours, booking, information on the Outback.
- http://www.diamantina-tour.com.au

Sahara Overland
- Paleontological, geological, and off road field expeditions in Morocco. Order information on fossils available.
- http://www.saharaoverland.com/

Eclipse Tours
- Solar eclipse tours to the next total solar eclipse, also includes tour packages for the Leonid Meteor Showers.
- http://www.eclipsetours.com