In Alaska, you can find 52 volcanoes, and Makushin is one of the most active. It is the highest peak of Unalaska Island (1800 m) and still erupting. The last eruption of Makushin was in 1995. Still, it is a popular destination for hiking. Though its cliffs are not the easiest to hike, the view from the top is truly amazing. The mouth of the volcano is cerulean blue, so it looks rather like a huge mountain geyser.