At Paws 4 Fun Park in Lincoln, Neb., there are two play areas for large dogs and two play areas for small dogs at this 12,000-square-foot indoor dog park. There's even an indoor saltwater pool just for pups. Between swimming, running through tunnels and palling around with other dogs, your furry BFF may not know what to do first. Owners, settle in at the lounge with a cup of coffee and free Wi-Fi.