Right outside of St. Louis there is a 105-acre park dedicated to sculptures: the Laumeier Sculpture Park. It not only features 60 different pieces of art perched throughout the grounds, but there are plenty of shaded paths to keep out of the sun. And if it does get just too hot, you won't be out any money because the whole park is free!
Instead of roasting in the heat, you and your pooch can head on over to Three Dog Bakery in Kansas City and peruse the food in the comfort of air conditioning. If it wasn't enough that they have a ton of treat options, they also bake treats in-house and even customize them for special occasions.
Three fenced dog parks, two other off-leash areas, plus several shady spots and water features that your pooch can take a dip in to cool off. Need we say more? Oh, also, it happens to be on a beautiful plot of Missouri land. Thanks, Mother Nature!