Pre-Columbian artifacts in America?

Question

Can anyone direct me to a site that lists and describes unexplained "Pre-Columbian" artifacts like the Los Lunas stone, roman coins, ruins, etc., that have been found in North America?

Answer 1

http://www.mississippian-artifacts.com/

Here is one about the Pyramid cities along the Mississippi.  I too heard about the Roman coins http://www.thetruthseeker.co.uk/article....

http://paranormal.about.com/library/week...

Answer 2

The Clovis culture (less frequently referred to as the Llano culture in the Plains and Southwest today) is a prehistoric Native American culture that first appears in the archaeological record of North America around 11,000 radiocarbon years ago, at the end of the last ice age. Archaeologists' best guess at present suggests this is equal to roughly 13,000 calendar years ago.

The culture is named for artifacts found in the Blackwater Draw near Clovis, New Mexico. Clovis sites have since been identified throughout much, but not all, of the contiguous United States, as well as Mexico and Central America, and even into Northern South America (see Pearson and Ream in Current Research in the Pleistocene 2005, Volume 22).

The Clovis people, one of several Paleo-Indians groups, were long regarded as the first human inhabitants of the New World, and ancestors of all the indigenous cultures of North and South America. However, this view has been contested over the last thirty years by various archaeological finds which are claimed to be much older. (See: Monte Verde and Meadowcroft Rockshelter)

The Clovis culture seems to have ended at the time of the Younger Dryas cold climate period (hypothesized to be the effect of an impact event).