Cartagena is celebrated for its resistance against Spanish attacks and holds two important national festivals. San Andres Islands have beautifully transparent waters and white sand beaches. Caño Cristales is dubbed the most beautiful river in the world for its striking colors produced by river algae. Santamarta has the most beautiful bay in America, popular for its beaches, dolphin swimming, and archaeological sites. Nevado del Huila National Park impressively features the country's second largest glacier formed atop four peaks and home to golden eagles and condors. The Tatacoa Desert covers 330 square kilometers of ochre and gray landscape dotted with green cacti and is habitat for various wildlife.