In the mid-19th century, the California gold rush spurred the need for faster transportation between America's east and west coasts. While a railroad across the Isthmus of Panama shortened travel, a continuous maritime passage was required to avoid costly and time-consuming transshipment.

French diplomat Ferdinand de Lesseps, successful with the Suez Canal, led the first attempt in 1881. Overconfident, he insisted on a sea-level canal, leading to futile excavation through the Continental Divide and continuous landslides. Unprepared for Panama's harsh wet season, tropical diseases, and dangerous fauna, the project resulted in 22,000 deaths and $287 million spent before being abandoned.

The United States, initially considering a canal in Nicaragua, saw an opportunity to succeed where France failed. Panama, then part of Colombia, sought the canal for economic and prestige reasons. After Colombia stalled negotiations, President Teddy Roosevelt supported a Panamanian coup in 1903, leading to Panama's independence and a treaty for canal construction.

The Americans learned from French mistakes, opting for a lock system to raise ships 26 meters above sea level using five canal locks. This design utilized the low-lying Chagres River valley, which was flooded by the massive Gatun Dam, to create a reservoir. This eliminated the need to excavate the entire mountain, focusing instead on the canal's direct path.

Despite the innovative design, the project was arduous. It took 24,000 workers nine years to excavate the 14-kilometer Culebra Cut through the Continental Divide, moving 76 million cubic meters of rock. Accidents and diseases, particularly among Black Caribbean migrants, claimed 5,000 lives. In 1913, a dike explosion triggered by President Woodrow Wilson joined the Atlantic and Pacific Oceans. Today, the canal remains Panama's primary source of revenue and national pride, with 14,000 vessels traversing it annually in under 12 hours.