Ha Ha Tonka Castle is the remainder of a stone castle from the early 20th century situated in Ha Ha Tonka State Park, Camdenton, Missouri. The ruins are accessible on foot via a series of trails and boardwalks through the state park which also has intertesting geological features including sinkholes, caves and a large natural bridge.
The castle itself offers impressive views of Ha Ha Tonka Spring and Lake of the Ozarks. If you visit Ha Ha Tonka Castle, there are a number of picnic sites to ensure you can make it a full day of exploring and castle-hunting.
For more details about Ha Ha Tonka State Park, click this link.
Castle Gould, Sands Point Preserve Conservancy, New York is a 100,000 sq ft limestone castle built in 1904.
The Pink Castle in Flintridge, California is a prominent, castle-like residence built in 1911.
Hillcrest Museum Castle in Souris, Manitoba, Canada (previously Squire Hall) is one of Canada’s most important heritage properties.
Ridge Rook Castle in Rogersville, Tennessee is a castle-like private residence with crenellated roof-line set in the Clinch Mountains.