The Top 17 Engineering Fails, Explained

3. Got Manholes?

Manholes serve as openings at intersections or bends in the sewer system below streets and sidewalks. And generally speaking, they are not highly concentrated in one place.

Except for these ones.

Which makes us think that perhaps they’re not manholes at all. Maybe this is where Splinter raises his teenage mutants … who are now demanding their own separate entrances?

4 of 19