The Appalachian Mountains were once taller than the Alps.

During their formation, the Appalachians were significantly higher than they are today, possibly rivaling or exceeding the height of the modern Alps. Over millions of years, erosion has worn down the Appalachian Mountains, leading to their current rounded peaks and rolling hills. While the Alps are still a prominent and high mountain range in Europe today, the Appalachians' ancient heights are a testament to the dynamic geological processes that shaped both ranges.