Kempt Tower, Martello tower in Saint Ouen, Jersey

Kempt Tower is a granite fortification built in the 1800s that stands at the edge of Saint Ouen's Bay, overlooking the Atlantic Ocean. The structure was originally equipped with heavy guns and formed part of a broader defensive system protecting the island's coastline.

Kempt Tower was completed by the British in 1834 and named after Sir James Kempt, Master-General of the Ordnance from 1830 to 1834. While governor of Canada, Kempt had helped plan the use of Martello towers to defend that colony. The tower is also known as Saint Ouen No. 2 and La Grôsse Tou in Jèrriais.

The tower is named after General Sir James Kempt and represents Jersey's role in British coastal defense during a period of international tension. It shows how the island was strategically positioned to protect British interests in the Channel.

Kempt Tower stands in La Grande Cueillette, Saint Ouen, within the Les Mielles conservation area, and serves as its interpretation centre. The ground-level door is a modification from the German occupation of the Channel Islands, so the entrance differs from the original design. The tower is 35 ft (11 m) tall and 27 ft (8.2 m) in diameter.

The tower's ground-level door is a modification from the German occupation of the Channel Islands, not part of the original 1834 design. Its interior is a doughnut-shaped space around a brick column, and the tower stands 35 ft (11 m) tall with a 27 ft (8.2 m) diameter.