The dog days of summer are here, and you know what that means -- pictures of adorable dogs on vacation, of course! (What did you think we meant?) Even a man's best friend has got to chill out during the hottest part of the summer. So if you've been working like a dog, follow the lead of these cute pups and indulge in some much-needed R&R. Just don't forget to bring Fido on your getaway.