Action Park

Infamous waterpark that Jersey teens form the 80s and 90s remember as a literal death trap. 6 people died and scores were hurt while enjoying a rather lax level of supervision.

The original owner set up his own insurance company based in the Cayman Islands to protect himself from all the lawsuits.

Raucous video here: http://www.nj.com/news/index.ssf/2013/08/inside_action_park_the_worlds_most_dangerous_park.html
It appears that the park has re-opened in a much tamer form.