Cinematic 4K. A strait is a naturally formed, narrow, typically navigable waterway that connects two larger bodies of water. Most commonly it is a channel of water that lies between two land masses. Some straits are not navigable, for example because they are too shallow, or because of an unnavigable reef or archipelago. Greek islands Mediterranean Aegean big channel transition time lapse small fishing boats blue sea ocean forest green Island and peninsula Marmara hot air thermal fluctuation white zoom 3840×2160 UHD 4K.