Unlike any other park, Chamizal memorializes diplomacy. When the Rio Grande shifted course at the end of the 1800’s, it created an island and a seven decade long border dispute with Mexico. President Kennedy went to Mexico to finalize an agreement, and LBJ later participated in the joint ceremony at the border here. There’s a beautiful mural on the visitor’s center, and I remember from a previous visit that there’s a film that explains the importance inside.