Port Blair also serves as the entry point for visiting the Andaman and Nicobar Islands. Port Blair is connected with mainland India by both air and sea. It is a 2-hour flight from mainland India to Port Blair, but it takes 3–4 days by sea to reach Chennai, Kolkata or Vishakhapatnam. Air connectivity to Port Blair is available from Chennai, Kolkata, New Delhi, Hyderabad, Mumbai, Bhubaneshwar and Vishakhapatnam. All flights bound to Andaman and Nicobar Islands land at the Veer Savarkar International Airport. Sea connectivity is available from Chennai, Kolkata and Vishakhapatnam are embarked in Haddo Wharf Port. It is home to several museums and a major naval base INS Jarawa of the Indian Navy, along with sea and air bases of the Indian Coast Guard and the Indian Air Force. Port Blair is also famous for the historic Cellular Jail and other small islands like Carbyns Cove, Wandoor, Ross, Viper etc. which were once home to British colonists.