Every block on Calle 60, for 15 or so blocks in the Centro area, is spanned by Christmas lights featuring an angel, tree, Santa, or a candle and stars. Though this picture is poor the decorations are really quite stunning.
My apartment is between Calles 62 and 64 so Calle 60 is a block and a half away.
The streets of Merida are laid out with the even numbered streets running North and South and the odd numbered street running East and West. The traffic on all the streets is one way, alternating direction, except for a number of wide boulevards with traffic running in both directions and which generally run diagonally to the numbered streets and seem to radiate from a series of traffic circles.
The streets are clean, are well lit a night, and safe for children to walk alone at night.