1. Cook's Castle was built on the top of St. Martin's down, it no longer exists. Position marked is only approximate

From Jenkinson's practical guide to the Isle of Wight (1876)

"Those who continue on the path all the way from Shanklin will reach Cook's Castle by bending to the right soon after the Worsley obelisk comes in sight, and then entering a wood, by a stile at the south-east corner. The castle is nothing more than a modem turreted tower, said to have been built in order to enrich the view from the windows at Appuldurcombe house. It is deeply embowered in trees and is a favourite place of resort for picnic parties."