As gross as sewers are already, this 15 plus-ton block of fat is probably enough to turn the stomach of even the most seasoned sewer worker. | Thames Water

'Fatberg' and Other Shocking Sewer Surprises

Not everything that goes down the drain gets flushed away; you'd be surprised what can come floating back up.

April 22, 2015
11:15 AM EDT
This hideous mass is actually a colony of tubifex worms. | YouTube screengrab
An entire village was found at a sewer construction site in Iowa. | University of Iowa
Grisly discoveries like body parts or decomposing bodies are tragically common. | Getty Images
Capitalsaurus is the official dinosaur of Washington, D.C. | Getty Images
A Civil War-era cannonball was discovered 15 feet underground in a sewer in Indiana. | Getty Images
This baby was rescued after being trapped in a drain pipe in China. | Getty Images
Alligators in the sewers of New York City? Urban legend. Frozen alligator in the sewers of Cleveland? Fact. | Getty Images
Snakes don't belong down drains. | National Park Service
This jewelry display shows part of the loot recovered by authorities after a $110-million heist. | Getty Images