hi..my husband and i are thinking of returning back to costa rica as we loved it sooo much last time. We went to arenal and stayed at the nayara and then went down to manuel antonio and stayed at the arenas del mar. We def are interested in arenal again but dont know where else to go to on our trip. It's just us traveling with no children. My husband loves adventure...repelling, white water rafting, etc. I zip lined for the first time in costa rica and want to do it again.....any advice on where to go would be great. thx!