Gondor was the greatest kingdom of Men in Middle-earth. It was founded by the survivors of Numenor, Elendil and his sons Isildur and Anarion. In the early part of the Third Age, Gondor rose to the height of its power, but then it began to decline. The line of Kings ended and Gondor was ruled by the Stewards. Still Gondor remained as the first line of defense between Mordor and the rest of Middle-earth. At the end of the Third Age, Gondor faced the might of Mordor in battle, and a King returned to the throne at last.
From the cache site, you have a glorious view before you (weather permitting, of course). I like to imagine it as the Realm of Gondor, but it is East Lothian in reality.