The Panama Canal Railway has a rich past—literally so, as it was built after California's gold rush to haul spoils back to the East Coast of the United States. Ships would arrive with gold from California, and later the Klondike as well, and unload their cargo on the Pacific coast of Panama. After the gold was transported across Panama by train, ships on the Caribbean coast would load the cargo and continue the journey to the United States. An engineering feat in its own right, it got waylaid by the construction of the Panama Canal. In 2001, the line was resurrected to handle freight, and luxurious, wood-paneled passenger cars (including one with a domed ceiling) were added. You can see them traveling down the tracks parallel to the canal.