On E. Colfax Avenue sits the Colorado State Capitol Building, completed in 1908 when the final adornments of gold leaf gilded the massive dome. A trip to Denver is incomplete without having visited the Capitol, as it offers free historical and legislative tours-during which you may be able to catch some of the action of an in-session legislature- and Mr. Brown's Attic tour, which encompasses both a brief history of Colorado and an informing lecture regarding the legislature. Finally, the Dome Tour takes you up the 99 steps to an interior observation area in which you can glimpse at Downtown Denver via the incredible views. Self-guided tours are also available.