Mud volcanoes - Southwest of Niland at the intersection of Schrimpf Rd. and Wister Rd. To reach from Niland, go south about 2.5 miles (4.0 km) on Highway 111 to Schrimpf Rd. Turn right onto Schrimpf (note: Schrimpf and Wister are graded dirt roads but are well maintained and should be passable by all passenger cars). Go west for 3.4 miles (5.5 km) on Schrimpf Rd. to Wister Rd. Turn right onto Wister Rd. The mud volcanoes will be in a dirt field on the right side of Wister Rd. (Note: Wister Rd. may also be signed as Davis Rd.) Here, CO2 gas bubbling up through mud has created mud volcanoes ranging from a few inches high to more than 8 feet (2.4 m) tall. Activity in the various vents range from slowly seeping mud to whistling tubes to mud being thrown vigorously into the air. Bubbling pools and mudpots are also found in this field.