How Did They Build That? : Sky Gardens & Seismic Stations<br />How Did They Build That? Sky Gardens & Seismic Stations<br />How Did They Build That?<br />Series 1 Episode 7: Sky Gardens & Seismic Stations<br />In this episode discover the world's longest sky gardens, a radical railways station built in the shadow of an active volcano, and the world's most slender tower.
