These four photos represent the furthest I have been on the earth so far and are therefore my personal thresholds.
Talinn – Estonia, overlooking the city towards the Baltic Sea
Mekong Delta – Vietnam, at some point on this boat ride I was furthest south.
Nha Trang Beach on the Pacific Coast of Vietnam (South China Sea)
A Fishing Village on the Atlantic Coast of The Gambia
This will, of course, change in the summer with the move to Mwanza, Tanzania pushing the southern boundary below the equator for the first time. 😀
What are your geographical thresholds? Note you have have set foot outside an airport for the location to count.
Tanza-Longs 
Great photos 🙂 The ‘south of the Equator’ will be a wonderful threshold. You will see a new perspective on the God of the Universe’s creation when you look into the sky at night. Enjoy when it happens 🙂
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