St. Mary's Island About 6km from the Malpe coast into the Arabian Sea, one gets to see the palm-fringed St. Mary's Island which bears the cross that Vasco Da Gama placed when he landed in 1498. The island is 300m long and 100m wide. It is famous for its unique salt rock formations. Due to this geological importance, St. Mary's Island is declared as a National Geological Monument. It is also rated among India's top 7 Natural Wonders by Jet Wings Magazine (November 2009).