This is 99% invisible.

I'm Roman Mars.

There's a big old apartment building in South Minneapolis

that looks out of place.

It's in a residential neighborhood

with small bungalows and some auto body shops.

But this apartment building fills up an entire corner lot.

I've bypassed this place hundreds of times and it always struck me as kind of weird. That's reporter, Katie Thornton.

I started digging through old newspapers and I found out why it's there.

That building is the last remnant of an early 1900's amusement park.

It was called Wonderland. A friend of a friend named

Hillary lives there now and she gave me a tour. We are at my apartment building.

It's on the corner of 31st and 31st in South Minneapolis.

As I understand it, there was an amusement park here.

The park had a roller coaster in a dance hall and a log flume, but the biggest attraction was something much stranger.

A bizarre sideshow that used to fill the apartment complex where Hillary lives now.

When she signed the lease, her landlord told her the building used to be called the

Infantarium.

What he said at the time was like they had premature babies like living in this

building and being taken care of in the building as part of the

attraction of the park.

Visitors to the Infantorium would pay 10 cents to enter a spacious room full of glass

...