«Leviathan Edge» (2009) is a partial skeleton of a male sperm whale visible through narrow slits in the wall. (reuters.com)
Apart from travelling on flat surfaces, it can also climb slopes, squeeze through narrow slits and transport loads. (sciencedaily.com)
Behind them rose a tall, dark keep with narrow slits for windows and several square towers, the tallest of which had a lantern shining in its upper rooms. (bookpage.com)