ACE Caving Experience
   Offers beginner and intermediate trips in the Allegheny Mountains of Eastern West Virginia. Includes prices, location and contact information.
   http://www.aceraft.com/cave.html

Acclimbatize
   Outdoor adventure activities provider with guided caving tours in the Yorkshire Dale, Peak District and France.
   http://www.acclimbatize.co.uk

Aktun Dive Center
   Cave and cavern diving in Quintana Roo, Mexico.
   http://www.aktundive.com/

Andy Sparrow - Caving Services
   Offers a range of caving-related services including recreational caving and potholing sessions for beginners. Located in the Mendip Hills of Somerset, UK.
   http://www.ascaveservices.demon.co.uk/

Aqua Exploration
   Information on cavern and cave instruction and guiding in Yucatan, Mexico.
   http://www.aquaexploration.com

Aquatech Dive Center
   Cave diving instruction and guiding in the heart of the Akumal-Tulum area in Mexico.
   http://www.cenotes.com

Bahia Divers
   Cenotes diving and training from a dive center located in Akumal, México. Pictures, contacts, course information.
   http://www.bahiadivers.com

Cave Courses
   Diving courses for various levels of skill and experience from this company based in Lake City, Florida, USA.
   http://cavediving.org/cave~courses/index.asp

Cavern Diving - Menorca
   Features instruction by Gavin Newman. Includes biography, courses offered, photography, video and film, photo sales and contact information.
   http://www.action-photo.u-net.com/

Cavern Team
   Guided tours to the caverns and caves along the Mexican Riviera Maya, from Playa del Carmen just across Cozumel.
   http://www.cavern-diving.com

Cenote Dive Center
   Training, tours and exploration on the Yucatan peninsula. News, gallery, prices, package information, accommodation and course information.
   http://cenotedive.com/

DIR Mexico
   Cave diving instruction and guiding in the Yucatan Peninsula, Mexico.
   http://www.dir-mexico.com

Enjoy Travelling
   Features diving in the Riviera Maya and Cozumel. Includes photos and contact information.
   http://www.enjoytravelling.com/services.html#cave

Farrworld Courses
   Cave diver courses in South Wales with Martyn Farr
   http://www.farrworld.co.uk/courses.html

Green Mountain Holidays Caving Trip
   Guided caving trip in the Apuseni Mountains, Romania.
   http://www.greenmountainholidays.ro/cavingtrip.html

Hidden Worlds Cenote
   Cavern diving and snorkeling tours on the Maya Riviera, Mexico.
   http://hiddenworlds.com.mx

Inner Mountain Caving Explorations
   Located near Asheville, NC. Information on trips, prices, caves visited, safety and gear.
   http://www.innermtnexplorer.com/

KBB Holidays Caves Explorer
   Day tours to the caves of Kelantan including Gua Ikan, Gua Keris , Gua Pagar. Itinerary, contact details and local information.
   http://www.kb-backpackers.com.my/caving.html

Ka`Eleku Caverns
   Guided tours operated by Maui Cave Adventures, Hana, Maui, Hawaii, USA.
   http://www.maui.net/~hanacave/

Kula Kai Caverns
   Guided tours of the lava tubes of Southern Hawaii, USA.
   http://www.kulakaicaverns.com/htm/expeditions.htm

LocoGringo Underground Cave Diving Course
   Various courses available on Mexico's Caribbean coastline.
   http://locogringo.com/cavediving/courses.html

Mayawalk Tours
   A cave and jungle adventure package in Belize. Photos, rates and dates, contact information and package description.
   http://www.mayawalk.com

Mtech Menorca Technical Diver Training
   Cavern diving and training in Menorca, Spain. Course information, dive site descriptions, contacts and company history.
   http://www.menorcatech.com

Philippe Roux Caving and Canyoning Guide
   A state registered independent professional, guiding in South Ardèche. Trip summaries, dates, rates, contact information.
   http://www.canyon-speleo.com/indexa.html

Yorkshire Dales Guides
   Caving trips from introductory, ladder/life line and SRT to underground safety and self rescue.
   http://www.yorkshiredalesguides.co.uk/caving.htm

espeleobuceo.com
   Courses and tours in Majorca with JJ Lavergne.
   http://www.espeleobuceo.com/marco0i.htm