That’s all rough concrete and rocks I believe...not very beautiful. still is majestic and notable..but I think it has 61 bells and 5 octave range. Chimes every hour, and plays some “music”...probably plays rap or hip-hop nowadays.
If you want to read a small treatise on the modern architecture and it’s history, I would suggest the late Tom Wolfe’s book,.”From Bauhaus to Our House”
FYI and Freegards.