Construction of The National Monument was started in 1826 but was abandoned in 1829 due to lack of funds. It was modelled upon the Parthenon in Athens and is a memorial to those who lost their lives during the Napoleonic Wars.
It's an impressive structure but that's not why I like this photo, let me explain why I do. Triangles are a big compositional tool in photography, and whilst I'm not going to go into the details of why (I'm not qualified/knowledgeable/talented enough to do so), they are something I notice quite often in my own work, sometimes after the fact. Which brings me to what attracted me to this picture, the people, particularly the spacing of them. For example the space between white trousers person, monument person and red top person. Or the space between monument person, red top person and the person to the left of the lamp post. Both of these examples also create triangles. I don't have a reason for why I find this visually pleasing, I just do. Another feature I found pleasing was the juxtaposition between the two people at the monument and the two people either side of them. One of the people at the monument is taking a picture of the other, there is a relationship between them, whereas white trousers person and red top person are heading in completely different directions and appear to be singular with no relationship between them. Now, I'm certainly not claiming that I saw all of these things at the time of taking the photograph, I was only aware of the pleasing spacing between the people and, in terms of timing, trying to make sure the two people on the right didn't intersect with the lamp post, but I think noticing visual features that you like afterwards is important because it gives you more insight into what kind of things you like to see in your photographs and also teaches you to look out for these things when taking photographs in the future. Hopefully that wasn't too boring of an insight and apologies if it was too convoluted.