Icy cold water. Raging rapids. Deadly drops. Massive rocks that could easily flip a raft right over. This is the Anacasta -- the River of No Return.

But you have an experienced guide with you, so the Anacasta should be no problem. Until the guide jumps out of your raft to save a drowning woman. Now you're in charge of the boat, and there's a fork in the river. Go one way, and you'll have a safe, smooth trip down the rest of the river. Go the other way, and you'd better be wearing your life vest.