Almaden Quicksilver County Park

Almaden Quicksilver is a great park for hiking just south of Silicon Valley.  From Wikipedia, it includes the grounds of former mercury (“quicksilver”) mines adjacent to south San Jose, California,USA. The park’s elevation varies greatly: the most used entrances (on the east side of the park) are less than 600 feet (183 m) above sea level, while the highest point in the park is over 1,700 feet (518 m) above sea level.