Liscard Battery was built in 1858 to help protect shipping on the River Mersey and defend the port of Liverpool. It was equipped with seven 10-inch guns. Set back from the river and hidden by new building, it was known as "the snake in the grass" to local inhabitants. The battery was obsolete by 1912, and sold on and houses were erected on top, and now the site has an odd appearance with only the curtain wall and ornate crenellated gatehouse surviving.