The Indian state of Kerala borders with the states of Tamil Nadu on the south and east, Karnataka on the north and the Arabian Sea coastline on the west. The Western Ghats, bordering the eastern boundary of the State, form an almost continuous mountain wall, except near Palakkad where there is a natural mountain pass known as the Palakkad Gap. When the independent India amalgamated small states together Travancore and Cochin states were integrated to form Travancore-Cochin state on 1 July 1949. However, Malabar remained under the Madras province. The States Reorganisation Act of 1 November 1956 elevated Kerala to statehood.