The park's highway concourse was designed after a castle and is one of its most impressive features, measuring over 300 feet long, 15 to 25 feet high, and 12 feet wide at the base. The wall was the most difficult project built by the Civilian Conservation Corps. Stone was quarried from Beaver Bay and hand cut at the worksite. The original concourse plaza, with log guard rails, was completed in 1936, and later the CCC men replaced the logs with stone and added parking. During the park's developmental years in the 1930s, Gooseberry Falls State Park was a cooperative inter-agency effort, and because no state funds had been appropriated for park development, highway officials designated the area a wayside in order to receive roadside improvement funds.