And though their source[1] does not quite back Wikipedia on this particular sentence, let me just the that the idea has at least been written about, in the case of Göbekli Tepe[2] (in the south-east end of Turkey):

less than 5% of the site has been excavated, and Schmidt planned to leave much of it untouched to be explored by future generations when archaeological techniques will presumably have improved

[1] http://www.smithsonianmag.com/history-archaeology/30706129.h...

[2] https://en.wikipedia.org/wiki/G%C3%B6bekli_Tepe