Floating 780 miles across the Bay of Bengal from Kolkata, this port city in the Andaman archipelago is the splash-down point for the Mahatma Gandhi National Marine Park. Diving, snorkeling and glass-bottom boat trips provide views of rare corals and marine life. On shore, family-friendly Gandhi Park offers amusement rides and a nature trail. Nearby Viper and Ross islands contain historical remnants of British rule, while Corbyn's Cove has remains of Japanese bunkers at its palm-lined beach.