Take a spin on the Mariner of the Seas

What has 16 decks, room for more than 3,800 passengers and everything from a climbing wall to an ice-skating rink? It's Mariner of the Seas, which has just started sailing from Los Angeles to Mexico on seven-night cruises. Here's a look inside the Royal Caribbean International cruise ship, which is said to be the biggest to ever have its home port on the West Coast.