Grand Portal Point, Cape in Alger County, Michigan, United States
Grand Portal Point features towering sandstone cliffs that rise directly from Lake Superior, creating vertical walls that extend over 200 feet high.
The formation of this geological structure dates back millions of years when ancient seas deposited layers of sandstone that were later shaped by glacial movements.
Native American tribes of the Upper Peninsula incorporated the cliffs of Grand Portal Point into their traditional stories and used the waters for fishing.
Visitors can access Grand Portal Point through a 4.6-mile hiking trail from Chapel parking area, requiring sturdy footwear and water supplies.
Lake Superior's waters have carved natural archways and caves beneath the cliffs, which change color throughout the day due to mineral deposits.
Location: Alger County
Address: Grand Portal Point, Munising Township, MI 49884, USA 49884 49884
GPS coordinates: 46.55000,-86.46278
Latest update: March 10, 2025 17:06
Natural geological formations featuring openings, arches, and caves across the globe. The collection includes limestone arches like Durdle Door in England, sandstone gates like Pravčicka brána in the Czech Republic, and coastal formations like the Faraglioni Rocks in Italy. These structures formed through erosion by water, wind, and other natural processes. Some formations serve as local landmarks, such as Window Rock in Arizona and the Eyes of God in Bulgaria. The sites range from accessible coastal locations to remote desert areas like the Aloba Arch in Chad.
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Munising School Public Library
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