A Sea of Cacti
- Gallery with photos by Alex Sievers covering Signal Hill, Esperanza Trail, Valley View and petroglyphs.
- http://www.sievers.nl/visitsaguaro/

Untraveled Road: Saguaro National Park
- Virtual walking tour of this Sonoran desert park in southern Arizona.
- http://www.untraveledroad.com/USA/Parks/Saguaro.htm

Pickatrail: Saguaro National Park
- Information about the park and cactus. Includes location maps, and an interactive trail map with trail-side photographs and GPS waypoints.
- http://www.pickatrail.com/sun/s/america/saguaro_national_park.html

GORP Saguaro Travel Tourism and Recreation Guide
- A comprehensive guide to travel, tourism and recreation in Saguaro National Park including activities, outdoor attractions, and maps.
- http://gorp.away.com/gorp/resource/us_national_park/az/index_sagua.htm

Saguaro National Park
- Official NPS site. Includes visitor information and a teacher's guide to the desert ecology of the park.
- http://www.nps.gov/sagu/

Get Outdoors - Saguaro National Park
- Saguaro National Park camping, lodging, wilderness, directions, fees and permits.
- http://syndication.getoutdoors.com/getoutdoors/destination_summary/44.html

Saguaro National Park - American Southwest
- Description and photographs of both sections of the park, east and west of Tucson.
- http://www.americansouthwest.net/arizona/saguaro/national_park.html

Saguaro National Park (DesertUSA)
- The saguaro has been described as the monarch of the Sonoran Desert.
- http://www.desertusa.com/sag/du_sag_index.html