For those attending the upcoming 2011 Fall national meeting in Denver you will be a short walk from the Colorado State Capitol Building in Denver (200 East Colfax Avenue).
The following is an short bit from the Wikipedia page (http://en.wikipedia.org/wiki/Colorado_State_Capitol):
Serving as the beginning of the Capitol Hill district, the historic building is slightly higher than the rest of downtown Denver. The main entrance hall is open 180 feet (55 m) to the top of the dome, about the height of an 18-story building. Additionally, the official elevation of Denver is measured outside the west entrance to the building, where the fifteenth step is engraved with the words "One Mile Above Sea Level." From this step, at 5,280 feet (1,609 m), the sun can be seen setting behind the Rocky Mountains. A second mile high marker was set in the 18th step during 1969 when Colorado State University students resurveyed the elevation. During 2003, a more accurate measurement was made with modern means, and the 13th step was identified as being one mile (1.6 km) high, where a 3rd marker was installed.
Here is the link to information on touring the Capitol building: http://www.colorado.gov/capitoltour
P.S. it is stated that it is real gold on the top of the dome.