- parallel lines in your hometown (playgrounds, windows on important buildings in your town. riverbanks, railway station ...)
- passing straight lines (bridges and rivers, overpasses...)
- straight lines that intersect in some important localities or buildings (schools, municipal buildings, cultural institutions ...)
- mutual position of some important streets in your hometown
If there are some important buildings in the same street, for example, you can consider them as points, the street as a straight line and you could talk about collinear and non-collinear points.
Make a Sway presentation and add it the Wakelet.
If you are registered member, you will get an invitation soon.