Castolon, also known as La Harmonia Ranch and Campo Santa Helena, was a small community in southwestern Texas, United States, located in what is now Big Bend National Park along the Rio Grande. The location was first settled in 1901 by Cipriano Hernandez, who farmed the area and built the original Castolon Store, now known as the Alvino House.
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Official Website http://www.nps.gov/bibe/historyculture/castolon.htm
Address 79834, United States
Coordinates 29°7'48" N -103°30'47.002" E