Aerial view of a volcano caldera, Isabela Island, Galápagos Islands, Ecuador (© Frans Lan/age fotostock)

【October 14 2013】Isabela Island is not only the largest of the 18 main Galápagos Islands, but it's also one of the youngest. In fact, this volcanic caldera on the island still erupts from time to time, further increasing the island's size. Six volcanoes merged to form this land mass that resembles the shape of a seahorse.Explore breathtaking Gallery from the HuluTrip homepage over the past 5 years..