Present at the southernmost corner of the Galle Fort, Flag Rock once served as a Portuguese bastion. Nowadays though, it is regularly overrun by visitors looking to get those Instagram worthy pictures of the sunset. During the day, local adrenaline junkies use the bastion as a diving board. What makes this quite unsettling is that the waters below hide many rocks and landing in the wrong spot can have fatal consequences. After the Dutch took over the Fort, they used Flag Rock to warn incoming ships of dangerous rocks, from which the name was derived.