Felt tip pens- pointillism.  I've done this with Q-tips and paint, but I bet this is a lot neater!

Felt tip pens- pointillism. or Q-tips and paint, but I bet pen is a lot neater!

London Towers by Cheism nice use of layering felt tips

teach famous buildings and draw them.London Towers Art Print - This as some sort of scene from above-the amazing things you see when you leave somewhere sucky OR as the crowding dark things to escape from