Flower’s Barrow is an Iron Age hillfort, built over 2500 years ago, above Worbarrow Bay in Dorset on the south coast of England. Flower’s Barrow is located about 11 miles (18 km) west of Swanage and about 6.25 miles (10 km) south-west of Wareham. It is in the Jurassic Coast World Heritage Site and the Dorset National Landscape area.
Towering to the north over Worbarrow Bay is Flower’s Barrow ridge, part of the Purbeck Hills, a chalk ridge which runs east to Ballard Point north of Swanage. The ancient hillfort of Flower's Barrow rises behind the beach at Arish Mell. The hill lies directly west of the ghost village of Tyneham. Flower’s Barrow has a limited future because the southern part is falling into the sea at Worbarrow Bay due to coastal erosion. Probably more than half of it has already disappeared.