The Dallas Arboretum
This 66-acre botanical garden and arboretum is a serene haven in a metropolitan city. The arboretum was once a part of the 44-acre estate of Everette Lee DeGolyer and his wife. Located next to White Rock Lake it features a 22,000-square-foot Spanish style 1940s home, cafe, and several themed gardens. Check the website for low-cost ticket days and seasonal activities.