Richest Square Mile on Earth

In 1859, John Gregory discovered The Gregory Lode in a gulch near Central City, Colorado. It came to be known as The Richest Square Mile on Earth. More than $75 million in gold was taken from the mines there.
Address: Central City City Hall, 141 Nevada Street, Central City, Colorado 80427; 303-582-5251. Web: http://www.centralcitycolorado.us.
World's First Rodeo

The world's first rodeo was held on July 4, 1869 in Deer Trail, Colorado.
Address: Town of Deer Trail, P O Box 217,
Deer Trail, Colorado 80105; 303-769-4464;
Fax: 303-769-4466. Email: dttownhall@aol.com. Web: http://www.deertrailcolorado.org.
Cheeseburger Birthplace

In 1935, Louis Ballast of Denver, Colorado, was granted a trademark for the name of cheeseburger.
The cheeseburger itself was apparently first developed by a restaurant chef in
Pasadena, California.