It's a natural arch called Tianmen Dong (Tianmen Cave) in Hunan, China. There are surprisingly few pictures of it, though there's a video of some Western guys flying through it in stunt aircraft. (Don't try googling 'Tianmen Dong' - you'll get all kinds of, ah, dong-related sites.)
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Date: 2011-04-12 03:09 pm (UTC)Have something unrelated but amusing:
http://www.helpmesellmorebooksthanjustinbieber.com/head.html
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Date: 2011-04-12 03:12 pm (UTC)(no subject)
Date: 2011-04-12 03:26 pm (UTC)(no subject)
Date: 2011-04-12 04:40 pm (UTC)I blame you.
(no subject)
Date: 2011-04-12 04:45 pm (UTC)(no subject)
Date: 2011-04-12 04:48 pm (UTC)(no subject)
Date: 2011-04-12 11:15 pm (UTC)(no subject)
Date: 2011-04-13 07:54 am (UTC)(Don't try googling 'Tianmen Dong' - you'll get all kinds of, ah, dong-related sites.)
Skate or Dieeeeeeeeayyyyyyaaaaaaaaaaaa!!!!!
Date: 2011-04-15 12:15 am (UTC)(no subject)
Date: 2011-04-18 04:05 am (UTC)