Öskjuvatn is a stunning lake located in the highlands of Iceland. It is situated within the Vatnajökull National Park and is known for its deep blue color and unique volcanic surroundings. The lake was formed by a massive volcanic eruption around 1875, which created a caldera that now holds the water. The lake is approximately 220 meters deep, making it one of the deepest lakes in Iceland. It is surrounded by steep cliffs and is often visited by hikers and nature enthusiasts. The area is also home to various bird species, adding to its ecological significance.