Tiananmen Square, Beijing
complex of pyramids Temple Ruins. The largest of these being the Angkor Wat, said to be the worlds largest religious monument. See below for links to extra information.
The area of Bear River Massacre Site is 6,843,234.2102784 square meters.
The first was in Alexandria in the 3rd century BC and was the largest most significant libraries of the ancient world.
Sand Creek Massacre National Historic Site was created on 2007-04-27.
Wyoming.
The site you are on right now is the largest. It is Wikianswers!
Lawrence, Kansas
Wyoming.
rock spring, Wyoming
I've linked below the site that I find most helpful, and it 'claims' to be the worlds largest and most popular (see link below):
He was executed by firing squad on 23 March 1877 at the massacre site.
Sand Creek, Colorado