Tropic of Capricorn
Bicycling in Australia picture - As a land surveyor, a map-o-holic and an amateur astronomer, I could not just cross the Tropic of Capricorn without stopping and realizing that I stood at the southernmost limit of the tropics. For me, this was an important landmark. The point, however, didnt mark a change in weather. (more on http://bora.dacom.co.kr/~boonstra/aus/page09.htm )