This historical site in Idaho’s capital city is well worth your time if in the area, and especially for history fans. For just $5 (for adults), visitors can walk around the 100+ year old facility and get a feel for the environment inmates lived in when the prison was open. It’s interesting to see how the maximum security cells differed from that of regular ones, where those on death row were hung, as well as where laundry was done. The architecture is fascinating as well. Additionally, there is a museum on the premise that details the evolution of weapons throughout the years. If you take time to go through all the buildings, it should take about an hour or so to cover the grounds.
A scenic view and a brief history lesson are two gains you’ll make by visiting Diversion Dam in Boise. Located on the Boise River about 7 miles southeast of the city along Warm Springs Avenue, this dam is on the National Register of Historic Places. There doesn't appear as though there’s an option for a tour of the facility, but there’s a display with brief information about it. It’s also easy to take photos of the site. There’s a small area across the dam to park cars and a bike path between the road and dam, so watch out for cyclists.