From a network of cellars, wells and tunnels in the Czech Republic once used to create the world's most popular beer to the secret caverns and rock formations of the Cheddar Gorge in Southwest England,Underground Marvels puts the spotlight on the wonders that exist beneath our feet.
New information reveals the secret story of the Apollo 13 rescue, and how America's best minds used innovative science and engineering to save the lives of three astronauts facing life-or-death on one of NASA's most dangerous missions.