Paris has a vibe, but being a cute town on the river doesn't make it unique. Cobblestone does. Across the country, there are only 15 cobblestone homes in Canada, Webb said, and 12 are in Paris.

Metropolitain.io shows all 16 lines of the Paris metro system, and you can choose to view all the lines together or only selected lines, and in 2-D or 3-D. Selecting the "Time View" option lets ...