On the way to Solitaire one must cross the Tropic of Capricorn. This is the southernmost location where, depending on the season, the sun shines down from directly overhead. it does not really feel tropical on the other side. Warm during the day perhaps, but freezing cold at night.
The Tropic of Capricorn should actually be renamed the Tropic of Sagittarius. Yes, some 2000 years ago the sun probably was in the Capricorn constellation on the European Midwinter’s Day, when it is at its highest on the Southern Hemisphere. But everything changes, and the axis of the Earth and the Universe change, too. Hence, today we see the sun in Sagittarius, factually making it the Tropic of Sagittarius.
(Tropic of Capricorn, Namibia; July 2017)