My family of 3 adventurers plus me will be in La Fortuna, Manuel Antonio and Dominical this August. Everybody wants to do a zipline tour, even me, although I will be facing a lifelong fear of heights. Is there one that is known as being less high, less scary -- maybe for beginners (read: wimps)? I'd rather do one in La Fortuna, since we will be rafting and doing beach stuff at the other locations, but if there's a recommended zipline in one of the other spots, I'd do it. I've spent days researching this topic and still can't decide -- real life experience is required from you guys! Thanks!