This is part of the wall outside the Cavern Club where the Beatles started playing and where they were discovered by Brian Epstein.
All the bricks have the names of different bands who have played there - The Beatles, the Animals, the Who, Rolling Stones, Freddie and the Dreamers, the Drifters, Herman's Hermits, Little Stevie Wonder, Wilson Picket - Gerry and the Pacemakers - the list goes on and on and on. Those are just few of the ones that are on this section of the wall.
This wall is a pretty big wall and this is just a zoomed close up of a little bit of it.
This is probably the most famous club in the world of music history!