![]() It can take upwards of 150 years to deposit one cubic inch of these crystal formations. The main cave began forming more than a million years ago, and every drop of water entering the cave leaves calcite crystals on the ceiling, walls and floor. ![]() Cave of the Mounds is designated a “National Natural Landmark,” yet it may be easier to remember it as the “jewel box” of America’s major caves, named as such for the delicacy of its formations. This area is shrouded in the lore of vicious nor’easters and shipwrecks, making it a popular spot for scuba divers too. Take a grand tour on Apostle Island Cruises and you’ll see one of the best historic collections of lighthouses anywhere in the country. While beautiful from the shore, when the weather is warm you must see the islands by boat or, even better, set foot on an island and camp at one of the 60-some rustic sites. When the winter weather conditions are right, you can hike out to the caves to behold frozen waterfalls and chambers glistening with thousands of icicles in summer, kayak straight into the caves to explore them up close. Calling to the explorer in all of us, this national lakeshore is an archipelago of 21 islands dotting the waters of Lake Superior. Boasting some of the most pristine remaining sandscapes in the Great Lakes region, the Apostle Islands were named by National Geographic Explorer magazine as a top place to visit.Īmong the windswept beaches and cliffs, there are sea caves to explore, carved out over thousands of years by the rhythmic waves.
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