We've all driven by, maybe seen a few pictures on Instagram, but have you been inside?

Here's a firsthand look on what goes on inside one of Idaho's most famous landmarks.

YouTubers The Wolff Pack took a tour of the grounds, and trust us when we say you haven't really seen the Old Idaho Penitentiary until you've been inside. We won't spoil the entire tour for you, but it's fascinating to know there there have been murders, suicides, and all kinds of bizarre events that have happened on the grounds over the years.

Here's a little history on the Penitentiary per Wikipedia:

The Old Idaho Penitentiary State Historic Site was a functional prison from 1872 to 1973 in the westernUnited States. The first building, also known as the Territorial Prison, was constructed in the Territory of Idaho in 1870. The territory was less than ten years old when the prison was built east of Boise. From its beginnings as a single cell house, the penitentiary grew to a complex of several distinctive buildings surrounded by a 17-foot-high (5.2 m) sandstone wall. The stone was quarried from the nearby ridges by the resident convicts, who also assisted in later constructions.

There's much more to see on the tour that isn't shown in the video, but it definitely gives us a good glance on what goes on behind those old stone walls.

Back in January, we wrote about what events the Penitentiary puts on to celebrate Friday the 13th.

If you're interested in taking a full tour of the Old Idaho Penitentiary, you can get more information here.