Grade One Puzzle Mystery Cache

A puzzle based on distances, but you'll need your GPS as well as your tape measure. Ignore the headline co-ordinates - they are for a traffic island with little to recommend it. The cache certainly isn't there.

Classification is a wonderful thing - so many ways to divide the world into lists and measure it. Have a look at this one and identify locations A-F.

According to Google Maps, the cache is hidden:

• 17.685km from point A
• 2.998km from point B
• 4.147km from point C
• 6.299km from point D
• 7.525km from point E
• 10.452km from point F

But the more accurate (and more complicated, naturally) Vincenty Formula says it's hidden:

• 17729.210976m from point A
• 3004.730885m from point B
• 4154.396672m from point C
• 6319.051293m from point D
• 7543.101863m from point E
• 10460.053812m from point F

Off you go.

Finders' profile badge

As some people like to collect these, we have created one for finders of this cache - once you have logged a valid 'find' please contact us for the display code.