In addition to the Baskin-Robbins tie-in, Wikipedia reports that 31 is Turking slang for mastubation ("otuzbir"). Knowing is half the battle, they say.
You'll have to use your imagination or some ether to make these look like The Exorcist stairs. Follow that bike!
What a scenic bicycle. Someone has an eye for color.
Choose the sinister path
The traysure is right in back of that widow-maker, nestled in the underbrush.
And if you want to know what a widow-maker feels like, crank this tune my brother and I loved as young lads.