32 miles from downtown Sacramento Is this picturesque spot? The black hole of Calcutta Falls. It's located along the american River in the Auburn state Recreation area, but getting here includes a trip over a significant piece in the history of bridge engineering. Yeah, near the trailhead is the mountain quarry bridge or as it's better known today, the No Hands bridge. Why is this bridge so notable? Built in 1912. This then $300,000 bridge was considered the longest concrete arch bridge in the state. It took 800 workers to complete the 480-foot long bridge at the time, this bridge carried some of the largest locomotives filled with limestone from the nearby quarry Up until the 1940s Since it is reported to have withstood the 1964 Hellhole Dam break an earthquake in 1975 and the Valentine's day flood of 1986. It even endured when protesters lobbied to keep it open after its closure in the 1990s. Today, the bridge stands as a historic landmark And a part of the Western States 100 Mile Endurance Race. So if you visit the scenic Calcutta waterfall, no. Two things number one load side parking fills up quickly even on the weekdays, and number two don't forget to savor a bridge crossing over history. This spot once the state's largest concrete arch bridge, the No Hands bridge spanning Eldorado and plaster counties near Auburn.