WATCH: Take a look inside the homeless tunnel
Homeless campers built an extensive system of caves and tunnels in Albany, Ore., at a park along the Willamette River.
The tunnels were built under old oak trees that were dead or dying, which arborists will now have to haul away.
Even a bathroom
The city's local authorities discovered these camps last month, and one man admitted to constructing the tunnel over the course of a year.
These camps were tall enough to stand in and included floorboards, window coverings and even a bathroom that fell into the river when campers fled.
Someone could be stuck in here it would cave in on them. When the river rises up this winter it will wash this out completely.
The Parks Department claims that it will cost $2,220 to restore the damaged area of Simpson Park, Lt. Alan Lynn with Albany Police said.
Lynn explained that there were drug issues, vandalism, littering and sexual offenses within these camps and that this type of disorderly behavior disrupts the community and park users.
One camper even said he wouldn't choose to live in the tunnel because it was too dangerous. Restoration of the park began last week.
WATCH: For more news of the day, check out our 60 Second Circa