Tennessee has The Old Stone Fort State Archeological Park. I ain't been there yet, but have read up a little on it. Here are some links:
tennesseeencyclopedia.net...
www.tennessee.gov/environment/parks/OldStoneFort/
en.wikipedia.org...(Tennessee)
Here is an exerpt from the Wiki article above, and I seem to remember one of my history teachers in school mentioning this:
The Old Stone Fort remained a mystery until the University of Tennessee conducted excavations within the structure in 1966. Throughout the 1800s
and early 1900s, numerous theories were put forth regarding the identity of the structure's builders, ranging from the overly-simplistic to the
exotic. In 1823, the Pioneer, a Jackson, Tennessee newspaper, argued that the Old Stone Fort was built by Buccaneers from Seville after one of their
ships wrecked off the coast of Florida and forced them inland.[8] In the mid-1900s, the discoveries at L'Anse aux Meadows and the supposed recovery
of Viking artifacts in various parts of North America led many to believe the Vikings built numerous stone structures throughout the Eastern U.S.,
including the Old Stone Fort. In 1950, author Zella Armstrong hypothesized that the fort was built by "Welsh-Indian" descendants of Prince
Madoc.[9]
Tennessee is a nice place, I love living here, but if memory serves correctly, this is about all we got in regards to antiquities.
BTW, what did I do wrong in inserting the first and last link? I tried four times to fix, but can't figure out what I done wrong.
Edit: never mind the last bit, posted reply and all was fine!
[edit on 1-2-2008 by seeker83]