Chilling by the river

This evening after work a trip into town on a lovely evening to search out a blip. While walking by the river I spotted  a lovely cat sat on a boat having a wash I then spotted a 2nd heading to towards the riverbank where there owner was sat reading . The 2nd one then settled just along the concrete bank away from its owner and relaxed. 
I really like how they stayed either on the boat or close by and wasn't interested in going exploring unlike a lot of cats would.
We have a house cat and wouldn't dare trying anything like this