With this Priority Mail Express®, the USPS travels to the icy north to celebrate one of nature’s amazing winter spectacles. Located near Munising on Michigan’s Upper Peninsula, Grand Island is a hub for outdoor activities in warm weather and in the cold months, the area has an arresting beauty of another kind.

Viewing ice "caves" and ice formations has become a popular winter activity at Pictured Rocks National Lakeshore and the surrounding area. Water seeping out of the porous sandstone cliffs freezes into curtains and columns of blue, white, or yellow ice. The ice generally begins to form by mid-December and remains until early April.