gods and the Discworld analogue of real-world Greek mythology's Mount Olympus. The area surrounding Cori Celesti is known as The Hub, a land of high, icebound mountains that serves as an analogue to the real-world Himalayas, polar regions (since, although the Disc has no poles as such, it is as far as possible from the Disc's edge and thus the sun), and Scandinavia – the Hublanders share many features with Vikings. Polar bears are renamed "Hubland bears", while the Disc's equivalent of the aurora borealis (described as being produced by the Disc's magical field, rather than by magnetism) is known as the "Aurora Coriolis". The areas closer to the Rim are warmer and tropical, since the Disc's sun passes closer to them in its orbit. At the Rim, a great, encircling waterfall (the Rimfall) sends the Disc's oceans cascading into space. Pratchett is evasive about how the water eventually returns to refill the oceans, only saying, "Arrangements are made." The mist from the plunging waters creates the Rimbow, an eight-colour (the eighth is octarine) double rainbow consisting both of light and of magic. Cardinal directions within the Discworld are not given as North, South, East and West, but rather as directions relating to the disc itself: Hubward (towards the centre), Rimward (away from the centre) and to a lesser extent, turnwise (direction of the disc's rotation) and widdershins (against the direction of the disc's rotation). The drawing on the front cover of Jingo shows a weathercock fitted with the requisite H, R, T and W letters. The disc rotates clockwise as seen from above. Circle Sea The Circle Sea is an almost landlocked body of water approximately halfway between the Hub and the Rim, opening at the Turnwise side into the Rim Ocean. The Circle Sea is analogous to the Mediterranean, in that it is bordered both by countries on the Sto Plains (Europe) and continent of Klatch (Middle East, North Africa). Its principal trading ports are Ankh-Morpork, on the Sto Plains coast, and Al Khali and Ephebe on the Rimwards side. Discworld civilization, which can broadly be defined as those countries that have invented the fork as well as the knife, is found around the Circle Sea's historic coasts. The countries around the Circle Sea are Ankh-Morpork, Ephebe, Djelibeybi, Klatch, Omnia and Tsort. The Circle Sea is the location of Leshp, an island that occasionally rises to the surface