
Patti Bailie, director of the Schlitz Audubon Nature Center preschool, helps Zack Durand out of an ice volcano, or ice-cano, at the nature center last winter.
Winter enthusiasts have been flocking to Bradford Beach, the Doctors Park beach and other spots along the Lake Michigan shoreline since last week's blizzard to check out a bizarre lunar landscape of craters, boulders and rounded mounds carved from the shoreline ice shelf by wind and waves.
Many are climbing inside ice volcanoes - ice cones several feet high that form along the lake when waves force water up through the ice.
"It's pretty cozy in here; I'm not going to lie," said Marna Lamson, 24, of Milwaukee, as she huddled inside an ice volcano close to shore. "It's very sheltered from the elements. The bottom is snow and ice."
While they may be fascinating to explore, naturalists warn that ice volcanoes also can be treacherous. Even if they're not spouting water because the mouth that links them to the lake has frozen over, volcano bases can quickly change from snow and ice to water, depending on conditions.
Ice shelves also can break apart unexpectedly with changes in temperature and wave action, said Don Quintenz, director of education at the Schlitz Audubon Center in Bayside.
"You can fall through the ice, so you have to be very careful," he said. "I've studied the ice, and I'm still amazed by how fast things can get soft, and what was solid becomes unsolid."













