Some of us prefer to relax with activities that turn our brains to goo, while others like to kick back with a real challenge. That's why puzzles exist, and other brain twisting nightmares like these impossibly complex mazes that took their creator over seven years to draw by hand.
The original, created by a Mr. Nomura in Japan back in 1983, was hidden in an attic until his daughter eventually discovered it. It was as much a challenge as it was a beautiful work of art, so last year he created an equally complex follow-up.
Both are available now as a 34x24-inch poster set for $US55 ($73), although you might actually want to consider ordering two of them -- one to solve, and one to frame and hang on the wall.