A pole of inaccessibility is the most remote geographic location from a point of access; it usually refers to the most distant point from a coastline.
On land, the point farthest from any oceanic coastline is N 44° 17.4' E 82° 11.4' which is located in northwest China. It is 1,560 miles from the Arctic Ocean and the Indian Ocean.
The oceanic pole of inaccessibility is S 48° 52.6' W 123° 23.6' which is in the south Pacific. It is 1,670 miles from one of the Pitcairn Islands, from Easter Island, and from Antarctica. Fun fact: look up this location on a Google Maps satellite view and see what you "find" there.
This cache can be considered a pole of inaccessibility of sorts within Oak Point Park. It is approximately equidistant from any walking trail or other point of access. When I placed the cache, it felt like I was the first person to ever step foot at that location. Here are a few generally unpleasant things you may encounter on your way to the cache: thorns, poison ivy, swamps, snakes, ticks, rivers, bobcats, coyotes, barbed wire, skunks.
Oh, one more thing: the ability to do a pull-up or two will be of great benefit to getting your name on the log.