To get lost in Lisbon is easy and most of times a rewarding experience but to avoid that you end up at the Castle if you wanted to go to Belém Tower, please follow this simple rules:
1) the doors of the streets are numbered from the south (where the river is located) to the north.
2) in the east-west orientation streets, the numbering is done in the west direction.
3) in squares or alleyways, the numbers follow the clockwise direction, being number 1 to the south.
Easy, right? ?