Esjan, also known as Esja, is a popular hiking destination in Iceland, located just a short drive from Reykjavik. This volcanic range offers various trails of different difficulty levels, leading to stunning summits like Þverfellshorn and Kerhólakambur. With its basalt and tuff rock composition and lush vegetation, Esjan provides hikers with breathtaking views and a chance to experience Iceland's unique landscape. However, it's important to check the weather forecast, wear appropriate gear, and know your limits to stay safe on this iconic mountain.