would also be great for a couple standing still for an engagement photo

Blurred umbrellas on a city street. Amazing and effective use of a slow shutter speed! It's an awesome artistic way to convey busy city life.

Towering Animals by ‘Irony & Boe’ Stalk the Streets of London http://www.thisiscolossal.com/2014/08/towering-animals-by-irony-boe-stalk-the-streets-of-london/

Towering Animals by Irony & Boe Stalk the Streets of London street art murals London animals

An amazing photo inside the Galleria Vittorio Emanuele II in Milan, Italy. Love the light of the setting sun with the shadows hitting the bicycle so dramatically.