A Victorian coastal fort on the headland at the entrance to Weymouth Harbour, with 360-degree views across the Jurassic Coast, Portland, and the bay. The fort was built in the 1860s as part of a chain of Palmerston fortifications along the south coast, and its walls, underground passages, and gun emplacements are largely intact.
The interior houses a museum covering the fort's history from the Victorian period through the Second World War. There are working cannons, period uniforms, and interactive exhibits suited to children as well as adults. The views from the ramparts over the harbour mouth are the best in town.