Your dog will love to run free and socialize at Wagg'n, an 8,100-square-foot indoor dog park in Missoula, Mont., which has special playspaces for small dogs and older dogs. Wagg'n even offers a self-service dog wash area at no charge, as well as social groups and educational talks. For owners, look for free Wi-Fi, coffee and flat screen TVs. A webcam lets you check in on your furry pal when you're out of the building.