NO. 429 LOWER LAKE STONE JAIL - This jail, claimed to be the smallest in the United States, was erected in 1876 of stone locally quarried and reinforced with iron. During the stirring days of the first quicksilver operations of the Sulphur Bank Mine, lasting from 1873 to 1883, obvious need for a jail led to its construction.
0.1 mi S of intersection of State Hwys 29 and 53, (16118 Main St, Lower Lake)
According to plaque: "Theodore and John Copsey commemorated the completion of the jail by over-celebrating, thereby becoming the jail's first occupants. Rumor has it that they were also the jail's first escapees - as they had failed to bolt down the roof."