As far as the first big crevasse; they wouldn't let me cross.

Joyce thought that a big crevasse had caved in.

Photo Joseph Michael Finding the big crevasse.

The big crevasse, which, as we knew, lay right across the line of our route, made us go very carefully.

The route might avoid this big crevasse and this overhanging ice wall, but the viewer doesn't necessarily have to know it.

Note the big crevasse stretching away on right- a"Bergschrund, "asthe Swiss call a break where one side falls below the other.