First, you have four puzzles to solve:
1) To know your ABCs is simply a matter of degrees
2) While DAE is ten less than the 100th prime
3) Next FG is a lune as well as the second perfect number
4) Finally, not least, HF 's not only the secret of the universe
But is also the product of the first three terms of Sylvester's Sequence
And, if you're careful, the result will be ABC DAE FG HF.
Those who solve the puzzle may, if you are smart, note that the result looks are more like a phone number than it does coordinates ... which was the original solution and, dialing that number, would get you a message giving you the actual GPS coordinates. That phone number, however, no longer exists and, therefore, you have to take a different path as follows:
Since we actually need two more digits, let I = G - E and let J = G + E and, once you complete these two steps, the location you seek is: North HI HD.DDI / West EFF AJ.GFI ... Happy caching.
Having recently been threatened with a period requiring occupancy of a wheelchair (which, happily, has proved unnecessary), I decided to create a number of wheelchair accessible caches making this #1 in the Handicapped Challenge Series. These will, of course, continue to be puzzles simply because limits on mobility do not mean limits on intelligence. Happy caching.