While frozen waterfalls form every year in the canyons of Starved Rock State Park in Illinois, the heavy snowfall and frigid temperatures this year have made them more spectacular than they have been in many years.  These were all taken in St. Louis Canyon at the west end of the park.
Ice Fall 2
Ice Fall
A detail of the lower half - Ice Detail
And of the upper half.  Unfortunately, the water falling from the creek at the top of the canyon is not very noticeable. Detail - Top of Falls
Finally, this is a view from behind the falls.  It is a little diffuse owing to the misting hanging in there.
Crystal Cave