Down 4 Mile Run towards National Airport and Rt. 1, there used to be an amusement park. I haven't been able to find out much history on this park, but I did find the picture below on the Arlington Co. website. 80 years later, standing in the place of this neat amusement park is a fabulous water treatment facility! I was even lucky enough to visit that treatment plant when I was in school for one of my Enviromental Engineering classes. Fun Stuff!!
"This amusement park, located in the area where Glebe Road meets Route 1, was built in 1906 for more than $350,000. It claimed facilities for 3,000 picnickers as well as a large ballroom, restaurant and circus arena. Exhibits were housed in large buildings of various styles -- Gothic, Moorish, and Japanese. A "shoot-the-chutes" with a 350-foot incline was a leading attraction. The park was eventually damaged by fire and dismantled in 1915."
Thanks to an anonymous commenter, here are a few more pictures of Luna Park: