Ernst Tinaja

Le Rio Grande Tunnel est un tunnel routier américain dans le comté de Brewster, au Texas. Protégé au sein du parc national de Big Bend, il a été construit en 1959, dans le cadre de la Mission 66, pour remplacer un virage dangereux de la principale voie traversant l'aire protégée d'ouest en est. C'est alors le premier tunnel routier de son État.

Boquillas Canyon is a canyon in the Big Bend National Park. The canyon walls are 1,500 ft high and carved out of thick layers of limestone. The canyon length is a matter of some debate, with estimates ranging from 5 miles to 17 miles, depending on the chosen endpoint. The Rio Grande river currents through the canyon are rated up to Class II.

Big Bend National Park is a national park of the United States located in West Texas, bordering Mexico. The park has national significance as the largest protected area of Chihuahuan Desert topography and ecology in the United States, and was named after a large bend in the Rio Grande/Río Bravo. The park protects more than 1,200 species of plants, more than 450 species of birds, 56 species of rept