Cuevas de los Portales is in Parque Nacional la Guira in Cuba's westernmost province, Pinar del Rio. It lies at the northwestern edge of the park about four miles from the main entrance. The Río Caiguanabo flows beneath this natural bridge. One wall of the arch contains an entrance to a cave with giant stalagmites and stalactites in a room with a 90-foot ceiling. The cave was used as headquarters for Che Guevara during the 1962 Cuban Missile Crisis. His original table, chairs, and iron bed still remain in the cave. The road here is very eroded and four-wheel drive is recommended. Photo by Alexander Bunt.