Need another diversion? Get on Google Earth and drop into a street view in Lisbon, and see if you can track down the streetcars. Took me about 10 minutes to find my first, then it wasn't too hard to follow the tracks and find more. The hard part was finding the right neighborhood to begin with. Put on some good music, enjoy a cool beverage, and let the summer heat burn on.
I'll have to give that a try!