Picture

I go there so you don't have to,
Cute Overload

I'm certain that I've seen something like this in real life - not at daylight, though.

Raccoons are certainly smart enough to discover that the storm sewers are a great way to get around town.

Back in the day, the openings at the Kishwaukee river were big and wide open. We did some exploring during dry summers. There was nowhere to emerge, just enough to pop up enough to see how far we'd traveled.

By high-school years, we discovered the steam tunnels under Northern Illinois University. We knew the unsecured place to get in (next to Swen Parson Hall), and then learned the paths to various buildings.

Dirty, dangerous, exciting.

Wiki article here.
Fuck, I was doing this back in the 1960's.