Cycling up the heart-pounding, cathedral hill in Lincoln, we left the flat marshlands behind. The Wolds of England generally aren’t too steep, but we still had to find our climbing legs again, after four days of biking through pancake-flat fields. In addition to the scenic beauty of the Wolds, we finally reached the North Sea. There, we visited a huge colony of nesting seabirds, including a few adorable Atlantic Puffins.