A man with an unfulfilled vision left a huge gash in the ground near Niagara Falls. Then a chemical company came along and filled it with toxic waste. Then people came along and built homes and an elementary school on top of it. Then things went badly.

Selects: Mangroves: Nature's Best Tree?
44:31

How the Kowloon Walled City Worked
41:27

Short Stuff: In-Flight Entertainment
12:23