Around the historic center of Mexico City, there are thousands of retail stores, each grouped by neighborhood according to what they sell. There are blocks and blocks of nothing but tire stores, for example, or lighting fixtures.
Hilariously, the sound system section of the city features stores trying to draw attention over the others by blasting music. They're ALL blasting music. And so walking down the street is an extremely noisy experience, according to my Apple Watch's sound level warning feature.
(Video taken via Ray-Ban Meta glasses.)