Hidden beneath the city for nearly 150 years, Old Sacramento s underground has long been the capital s best-kept secret. Today, you can join thousands of residents and visitors in uncovering the facts behind the legends that lie below our buildings and sidewalks. Explore excavated foundations and enclosed pathways while your tour guide recounts the tales of devastation, perseverance, and determination that led to California s only successful street-raising project. These hour-long guided walking tours check in at the Sacramento History Museum before descending below several historic Old Sacramento buildings. Be prepared to walk in areas with uneven surfaces and low ceilings and get ready to learn and have fun all along the way See the website to purchase tickets online.