Series Final: Roads to nowhere - The road across the scenic Mam Tor hill overlooking Castleton in England was abandoned in 1979. Now the remains of the road have become a popular scenic hiking route.
Quest for Power: Early in the twentieth century, electricity was the new wonder. Governments pumped fortunes into making them look great, only for technology to race on and make them obsolete.
When the German Fleet was scuppered in the waters at the end of WWI, a very interesting question was raised: what does man do with thousands of tons of cutting edge hardware now lying on the sea bed?
Bridges: Find out how the highest bridge in the world collapsed in less than one minute. Finally, we uncover the story behind Cape Town's invisible bridge, which never carried a single vehicle.
We aim for the stars and find out why unwanted battleship guns allow the United States to gain vital information about the borders of space.
New Series: Meet the people who designed amazing engineering projects and those that help revive them.