Linn is a Scottish word that means a waterfall or a pool where a river falls into. Imagine that you are playing with water in a stream and suddenly the water starts running very fast, forming a big splash and a lot of noise. That's a linn!
It's like a natural staircase for the river, where the water falls from one level to another. Sometimes, when many small streams meet, they create a bigger river with several linn. People like to visit these places because they are very beautiful and make a perfect spot for taking pictures or having a picnic.
In summary, a linn is a special place in Scotland where waterfalls from one level to another, creating a beautiful and noisy spot for people to enjoy.