Back in the late 1990’s I had the occasion to travel to Rio de Janeiro. This was a fascinating place, albeit very very poor. The beaches are beautiful but even in the broad daylight when you are around hundreds of people you are not entirely safe on the sidewalks.
The main beach there is called Copacabana. There is a horseshoe-shaped, wide, hand-laid stone sidewalk about 5 miles long that you can travel on. It must be 30 feet wide. There are hotels and restaurants on one side and the beach on the other side separated by a road.
The road is extremely dangerous due to the notion that the driver has the right-of-way in Rio. They drive very fast, regardless if people are in harms way or not, so crossing is dangerous and you must be careful.