House next to animal feed manufacturer in Old Town Harrisburg

(Houston -- Wendy Siegle, KUHF) While Houston has a number of sightseeing tours, most of them focus on the city's attractive destinations. But there is one tour that offers a sobering look at the dark side of Houston's industrial landscape.

Listen to the tour here: 010310toxic-tour, or visit KUHF.

More after the jump: