
An archipelago of 21 islands with sea caves cut into sandstone that freeze into spectacular ice formations each winter
Area
278 km²
Designated in
1970
Region
Wisconsin (USA, Lake Superior)
Protected since 1970, the Apostle Islands archipelago in Lake Superior holds sea caves cut into sandstone over centuries by the lake's swell; in the coldest winters the caves freeze into large stalactites and curtains of ice, reachable on foot across the frozen lake itself in years when the ice is thick enough — a phenomenon that has made the Apostle Islands ice caves a benchmark winter photography destination in the American Midwest.
1 dive site within 300 km is also shown.
Ecosystems found in the United States, where Apostle Islands lies.
Where can I dive near here?
176 km away
What is worth looking out for this month in the United States?
Now is a good time: Urban bat colony under Congress Avenue Bridge (March to November (peak in summer))
Which other parks are like this one?
Same country: United States
Same country: United States
Same country: United States
Same country: United States
Based on what we already know about this park.
Climate
Tropical, Arid / desert, Temperate, Mediterranean, Polar / cold
Best season
It depends on the region
Threatened:,,
AI-generated image: an illustration, not a photograph.