Is This the Oldest Wall in the World?

Wow!  VERY interesting find in Greece! From Yahoo News.

23,000 year old stone wall found at entrance to cave in Greece
Mon Mar 22, 12:48 pm ET

ATHENS (AFP) – The oldest stone wall in Greece, which has stood at the entrance of a cave in Thessaly for the last 23,000 years, has been discovered by palaeontologists, the ministry of culture said Monday.  Image: An undated handout photo provided by the Greek Culture Ministry shows an prehistorical stone wall. The ministry said Greek experts discovered the oldest stony wall of the country, blocking the entrance of a cavern for 23,000 years in Thessalia, in the north. (AFP/GCM-HO)

The age of the find, determined by an optical dating test, singles it out as "probably one of the oldest in the world", according to a ministry press release.

"The dating matches the coldest period of the most recent ice age, indicating that the cavern's paleolithic inhabitants built it to protect themselves from the cold", said the ministry.

The wall blocked two-thirds of the entrance to the cave, located close to Kalambaka, itself near the popular tourist area and monastic centre of Meteora in central Greece. Greek palaeontologists have been excavating the site for the last 25 years.

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Guess this cave must have been used for a long period of time for occupancy during the last Ice Age.  Wow.  The people who live today don't have anything on the people who lived in that cave back then.  They had the smarts to wall off most of the entrance against the elements - and they built that curtain wall strong enough to last all this time. Will any of our "mighty" skyscrapers built during the last 100 years survive 23000 years into the future?