Cairo, Egypt, in its history[?] has had a significant number of fortified gates protecting both inner and outer city. Apart from the purpose of defense they were also used for differentiation of the varied social and economic classes. Often the gates were heavily decorated as artistic pieces.
... Numerous whales visit the sea-coast. Sea-lions, seals and dolphins are a source of profit.
Sakhalin was inhabited in the Neolithic Stone Age. Flint implements, exactly ...