Santa Monica’s Old Muscle Beach has a dedicated slackline park where some crazy good slackliners join together in the afternoons. This is the first place that I ever tried slacklining and it’s pretty fun. This guy said that he was practicing all day and you could tell. He was pulling backflips and 360s and a whole slew of tricks off of the slackline. Even when he apparently messed up he landed on the sand like it was what he meant to do.