Then the pass closed in again; they wound along narrow defiles, with traces of snow in chinks and crannies. There were halts at wretched little shanties of stations; also at more important ones, which the train left in the opposite direction, making one lose the points of the compass. A magnificent succession of vistas opened before the awed eye, of the solemn, phantasmagorical world of towering peaks, into which their route wove and wormed itself: vistas that appeared and disappeared with each new winding of the path. Hans Castorp reflected that they must have got above the zone of shade-trees, also probably of songbirds; whereupon he felt such a sense of the impoverishment of life as gave him a slight attack of giddiness and nausea and made him put his hand over his eyes for a few seconds. It passed. He perceived that they had stopped climbing. The top of the col was reached; the train rolled smoothly along the level floor of the valley.