'Hostile' architecture is hiding in plain sight. Do you see it?

(NEXSTAR) – Once you see it, you can't unsee it. Examples of hostile architecture, also known as hostile design or defensible architecture, are everywhere in cities and public spaces.

You've likely seen it outside businesses, at bus stops, along sidewalks, and in parks, as it can take many forms. Hostile architecture is "hostile" because it subtly (or sometimes quite plainly) keeps people away.

"Through design you are making them uncomfortable so that they leave, or you're making particular activities that they tend to do uncomfortable," explained Anastasia Loukaitou-Sideris, a professor of urban planning and dean at UCLA's Luskin School of Public Affairs.

One common example of hostile architecture is simple: a bench divided in two, usually to discourage someone from lying down. Even th