3. The Most Beautiful Glaciers - Mendenhall Glacier Cave, Alaska
If you are a wannabe explorer, don't miss out on the chance to discover these partially frozen caves. Although you have to streak 12 miles, the breathtaking scenery of these caves makes it well worth it. Would you like to visit this place in the future? Hurry up because climate change is causing the ice to melt, according to Atlas Obscura.
