The Aletsch Glacier is the largest glacier in the Alps, located in Switzerland. It stretches approximately 23 kilometers (14 miles) and is part of the Aletsch Glacier UNESCO World Heritage Site. The glacier is a vital source of water for the surrounding regions and plays a significant role in the local ecosystem. Formed during the last Ice Age, the Aletsch Glacier is a popular destination for hikers and mountaineers. It is known for its stunning blue ice and breathtaking views of the surrounding Bernese Alps. Due to climate change, the glacier is retreating, raising concerns about its future and the impact on the environment.