Frostfound

"Towers and ramps and galleries and stairs of ice, raised and spun like an architect's honey-dream. No spider ever wove so complex a web. The towers are utterly pristine, untouched by human life, but a pitiable encampment squats by the dock."

Frostfound is quite literally an ice castle. Every year the people of Irem and Whither meet here for contests; they are trying to determine the difference between a question and a riddle. Those who prove themselves in the contests can enter the castle, which is sacred ground, but nobody has done so yet...

Trying to go beyond the Horizon will either warp a captain here or there, because there is only one way North.