By Bogdan Oporowski – Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=21166547
Fort Proctor near Shell Beach, Louisiana is a ruined fort (also referred to as Beauregard's Castle) built in the mid-1800s. Surrounded by water, the brick castle is largely intact externally so is still an impressive sight however it is not accessible on foot.
Fort Proctor is inaccessible on foot. The nearest town is Shell Beach, LA.
Bedford (Heiner) Castle, Wyoming. An Astonishing Fairytale Castle also informally known as The Star Valley Castle.
Chateau de Harpe – Fairytale Wedding Venue, West Linn, Oregon. Set on 68 acres, 30 minutes from Portland.
Whitehall Castle, Whitehall, New York – Amazing Former Armory and Now a Substantial Residence.