Panama is the great American curiosity shop. The first city founded by explorers in the New World, the oldest town in America inhabited by white men, the most conglomerate mixture of humanity on earth are in Panama. The bloodiest tale of modern history, the most romantic story of American exploration, the greatest engineering achievement of man all center in Panama. If there be any interest in congested and sweltering humanity, any concern for the problems of social uplift and personal reaction, Panama is the laboratory for study. The cleanest and healthiest towns on earth are on the Canal Zone, and the last word in shiftlessness and inefficiency is also here. Superstition and science, rascality and rhapsody, efficiency and squalor, graft and honor, all mixed and mingled--this is Panama. Jungle and plain, valley and coast, tropic heat and mountain paradise, fever-swamps and ideal sanitation, engineering success and life in the primitive open--these too are in Panama. Strange and mysterious traces are still found of the days when the gold of Peru was carried across the Isthmus on pack trains. Later the gold-seekers of California fought their way along the route of the present Canal and found ships on the west coast for the mines of Eldorado. If any survivors still live, they can tell stirring tales of the days when it was well worth a life to carry gold to Aspinwall. [Illustration: THE FAITHFUL MULE IS THE SHIP OF THE JUNGLE] It all began with Columbus himself when he sailed into Almirante Bay and thought that he had found in Chiriqui Lagoon the long-sought passage to India. What he really found, what was to follow his discovery, he could not have dreamed, adventurer that he was! Almirante (Admiral), Cristobal (Christopher), and Colon (Columbus) remain to-day to remind us of the illustrious explorer who first set foot on Panama. But Columbus gave us Panama, and never knew! It was Balboa who first saw the waters of the wide Pacific from the summits of the Isthmian hills. It was Pizarro who packed across the fifty miles of jungle the timbers of the ships which he put together on the beach of the Pacific and with which he discovered Peru, after indescribable hardships and repeated attempts to find the "hill of gold." [Illustration: THE HOMEWARD WAY AT NIGHTFALL] On the Pacific side of the Isthmus was founded Old Panama, the first city of the New World, where to-day majestic ruins stand, a fitting shrine for the reverent pilgrim. And between Old Panama and Porto Bello stretches the famous Paved Trail of Las Cruces.