Subject for next weeks challenge is Lines & Planes.

Show us your image where lines and planes (flat surfaces) are the main subject.
For example:
windows in a building, zebra crossings, shadows, electricity lines, whatever, as long as it is the main subject of your photo.
It might force you to go abstract or crop to optimize your composition.

Here is a tutorial with fine examples:
www.phototraces.com/b/lines-in-photography

Have fun, see you next Sunday.