2nd February 1915: A pair of tugboats pull the SS 'Kroonland' through the Cucaracha slide, heading south along Culebra Cut on the Panama Canal. (Photo by Hulton Archive/Getty Images)
2nd February 1915: A pair of tugboats pull the SS 'Kroonland' through the Cucaracha slide, heading south along Culebra Cut on the Panama Canal. (Photo by Hulton Archive/Getty Images)