Youtuber CassOnline describes himself as an "urban explorer" and that's pretty much exactly what he does.
The youngster spends his time clambering around the bits of cities that the general public aren't supposed to see -- "rooftopping" as it's known in the trade -- filming himself with a mini action camera as he goes.
Cass recently received a flood of requests from his followers to sneak into a football stadium at night, so he decided to pay a little visit to Anfield, home of Liverpool.
After scaling the outer wall of the stadium with worrying ease, Cass was eventually afforded views of Anfield's new main stand while standing precariously on the roof of The Kop.
It may be trespassing, and therefore entirely illegal and incredibly dangerous, but the results certainly are spectacular.