Google Flight Search is fine if you already have a destination in mind, but what if you simply want to sate your wanderlust? That's where a new "I'm Feeling Lucky" button comes into play. Hit that and the search tool will suggest a random place to go; if you're not feeling quite that spontaneous, you can set budget and time limits. Google has also added some tools for those willing to do some legwork, including a full-screen exploration mode and a region browser that suggests trips within the boundaries you've chosen. All the new features should go live today, so you now have plenty of opportunities for spur-of-the-moment expeditions.