Standing majestically for centuries, the world's great pyramids have long inspired and mystified scholars. Leading experts and historians explore the engineering genius that created some of the largest structures on the planet. From ancient Egypt to Central America, we visit these technological masterpieces.

Built of stone and glass, persistence, and prayer, gothic cathedrals are an epiphany of imagination and an articulation of joy. Featured are such masterpieces as Chartres, Notre Dame, and the National Cathedral in Washington D.C.

During the depths of the Depression, it was FDR's greatest triumph: A massive public works project that took a 40,000 square mile, disaster-prone river basin, and turned it into a model of industrial progress.

The task was monumental: Build the world's largest dam in the middle of the desert, and tame the river that carved the Grand Canyon--all in seven years! When the Hoover Dam was completed in 1935, it was the largest dam in the world. We'll reveal how this engineering wonder of the world was conceived and built.

It was meant to be a temporary exhibit, a demonstration of French engineering acumen at the Paris World's Fair. But to Parisians, the tower, designed by the brash, young Gustave Eiffel, came to stand for much more--revolution, innovation, and a soaring spirit.

It was an engineering feat of almost miraculous proportions and a design of spectacular elegance. Rare photographs and behind-the-scenes stories recall the politics, the struggles, and the tragedies that made possible "the Eighth Wonder of the World.

More than 50 years after its construction, the Golden Gate remains one of the world's great engineering marvels. It took 25-million man-hours and 80,000 miles of cable to complete. But the cost in human life proved even greater.

Chronicles one of the most incredible engineering feats of all time: construction of the 51-mile canal that took ten years to build and employed over 40,000 workers, 6,000 of whom died of yellow fever, malaria, and other horrors. An earlier, nine-year attempt by the French ended in failure and cost 20,000 lives.