3. The Algodones Dunes, located in the southeastern portion of California between the border of Arizona and Mexico is approximately 45 miles long. But what makes these particular dunes so unique is the curvy, fenced border people can see while driving by. The border fence constructed in 2008 to separate Mexico from the U.S. is 11 miles long and stands at 15 feet high.
Imgur | maxbig1Advertisement
