Threaded steel rods in the concrete-free foundation are the key to the Nautilus Observation Tower's first-in-the-nation ...

Part of Cape May Point State Park, the World War II Lookout Tower – officially known as Fire Control Tower No. 23 – was built in 1942 and is New Jersey's last restorable tower from World War II.

The Nautilus Observation Tower in Virginia Beach, Va., is an 80-ft-wide steel structure modeled after similar designs in Europe that is the first of its kind built in the U.S. A novel foundation ...