San Ma Lou, Surrounding Scenic Area and Street Food in Macau

The San Ma Lou you mentioned must refer to Avenida de Almeida Ribeiro， right?
If yes, you are right about that. There are a lot of scenic spots near the road, and you can reach just at walking distance, such as Ruins of St. Paul's, Monte Fort, Senado Square, Macao Museum and St. Dominic's Church.

The best places for street food in Macao is Rua do Cunha, you can go there to taste a lot of local and exotic foods.