We took the canopy tour with Arenal Mundo Aventura. The guides hook you up with harnesses and provide a brief instruction on how to keep yourself pointing forward and what to do if you should get stuck out on the line without making it to the end (as my partner did...). You ride in a tractor pull and then walk 15 minutes to the first platform (if you do not take the horseback tour). They hook you on and off you zip! --over the canopy, over the La Fortuna waterfall, within view of the volcano. Beautiful sights!! The longest line takes 1 minute to cross!!! A photographer goes with each group and we had been recommended to let him know that we would like to purchase the photos after so that he would be sure to take many of our couple. However, there was only one other couple with us (*low season perk!) so photos were ample regardless. The disk for high quality photos and videos was only $25 (a steal when compared with photos purchased on a similar tour in cancun!). Would recommend this tour company. The only pitfall is the lack of lockers for personal belongings. I had to leave my backpack behind the front desk and although it returned to me in full, I felt uncomfortable with the idea.