Tenerife is a favoured destination for scuba divers, with numerous dive operations of all qualities and nationalities. The waters round the island are diveable throughout the year, with the temperature varying between 18 degrees in January to around 25-26 degrees in August. Water sports are available in the south including surfing, wind surfing, speed boat parashooting and jet-ski. Nowhere seems to rent canoes. Santa Cruz has a big market by the station on Sunday mornings. Las Americas has one Thursday and Saturday and Los Cristianos on Sundays. Santa Cruz has a number of museums and an art gallery. Also a space museum and planetarium on a small scale near La Laguna. Barranco del Infierno is Hell’s Ravine, close to Adeje popular with hikers, you need to book to go on the walk. There is little to see but vegetation on this walk and a TINY waterfall at it??s end.