Just 40 minutes northeast of Cartagena is natural wonder, Volcán Totume. Here, you will find La Ciénaga Totumo with intense green waters as fresh water collides with the sea. The marsh provides a sanctuary for birds, and tourists and locals can enjoy a healing mud bath at the volcano. The volcano is not what you would expect, as it is more of a hill than a mountain. Visitors can climb to the top and the volcano is believed to have healing properties. Most tourists visit the volcano and natural spa in one day. It is best to book with a tour operator in Cartagena.