Vacation rentals have been a more popular alternative to hotels as of late for more reasons than one. They're private, spacious, often more affordable, and can be seriously out-of-this-world cool. And if you're traveling with your family, there's hardly an advantage to booking a tiny hotel room when you can vacation at a unique pad (though these travel companies will help you book a kid-friendly hotel). You might already be familiar with Airbnb, but there's another vacation rental company you need to check out: Vrbo. Like Airbnb, Vrbo offers vacation rentals around the world, and since we've already scoped out...