Mr. Andy Darley, an amateur archaeologist unearthing the Receda Cube, which was buried in Wakerley Great Wood, England (approximately 110 miles north of London) to claim the £100,000 price.

Perplex City is a puzzle-based worldwide treasure hunt and is one of the new games that mix reality with virtual communities. These new Alternate Reality Games (ARGs) are getting more and more popular.
Over 50,000 people played the Perplex City ARG.
Mind Candy, the company behind Perplex City is preparing Season Two of Perplex City.
More details on the Perplex City site.