I love a good narrow street . . .

There's nothing like a narrow street to draw me in.  Some go up, some go down and some are on the level, but they attract me in like a magnet.  

Occasionally they lead to a private courtyard and an entrance door - in which case I retreat discretely - but usually they lead to a whole new set of streets to explore or a vista over roofs or a big market square and surrounding cafés.  

Lisbon supplies me with many such unknown 'destinations' and in today's 35+ degree heat they also offered momentary shelter from the sun.