The State Capitol Campus in Olympia includes most of Washington State's government office buildings, including the Legislative Building, the governor's mansion and the Temple of Justice, home to the Washington State Supreme Court.
Both the Legislative Building and the Temple of Justice are open for self-guided tours on weekdays. The Legislative Building is a significant architectural landmark - its the tallest masonry dome outside of Europe. Washington State sets a good example for the rest of the country in terms of renewable energy - the 5th floor contains a 144 panel solar array.
The Executive Mansion, home to the governor, is the oldest building on the site, over 100 years old. Tours of this Georgian-style mansion are offered on Wednesdays only. Reservations are required and space is limited.
Other points of interest at the State Capital Campus are the Capitol Conservatory and the Story Pole, a 71-foot wooden pole carved by a Native American Snohomish Chief named William Shelton. The grounds, designed by the Olmsted Brothers, are open to the public for visiting the various gardens, memorials and sculptures. Views of Capitol Lake and Puget Sounds are a bonus, in the Capitol Campus, one of the most pleasant in the United States.