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Fort Henry is a Grade II listed World War Two observation bunker overlooking Studland Bay.

Located at the top of Redend Point, on a small sandstone promontory, the bunker is 90 feet (27 m) long with walls, floor and ceiling all 3 feet (0.91 m) thick. There is an 80 feet (24 m) wide recessed observation slit. Its name derives from the home base in Ontario of the Canadian Royal Engineers who built it.

The observation post played an important role in April 1944 in Exercise Smash, a series of live fire beach assault training exercises in preparation for D-Day. From here VIPs observed the exercises, with the beaches of Studland standing in for those of Normandy.