Default Oil leak! Any help appreciated!

Hey guys!
Alright so, I parked my 1996 DC2 Integra in the garage today and noticed a little puddle of oil on the ground.
I thought nothing of it and went for a drive, Around 40 minutes, Came back and there was a trail of oil along, (I dont know whats its called See pictures)
I wiped this off and about an hour later i checked it again because I had a gut feeling. And once again there was seeping oil along the piece of metal.
Also noticed that behind the headers there was a fine layer of oil aswell.
Yes i have checked my engine oil cap and there is no gunky stuff

Any help would be greatly appreciated!
Thank you!!