Coeur d'Alene's Old Mission State Park offers a fascinating glimpse into Idaho's history. The park features the oldest standing building in the state, an impressive 1850s-era mission built by local Native Americans and priests. Visitors can explore the mission and learn about its storied past through informative exhibits and a short film in the park's modern visitor center. The visitor center receives high praise, with reviewers noting its clean facilities and friendly staff. Many recommend watching the 18-minute movie to gain valuable historical context before touring the mission itself. Exploring the mission's "handmade" details and architecture is described as a "very impressive" experience. While parking can be limited, especially for larger vehicles, the overall experience is deemed well worth the $7 entry fee. The park's beautiful natural setting, with a picnic area and opportunities to spot local wildlife, add to its appeal. Some visitors even plan their trips to coincide with the park's annual Native American gathering in August. Overall, Coeur d'Alene's Old Mission State Park provides an enriching historical and natural experience for visitors of all ages. Its well-preserved mission and informative exhibits make it a must-see destination for those interested in Idaho's heritage.