To Americans: How far apart is everything in the US?

I've heard the legends of having to drive to literally everywhere (e.g. drive thru banks), but I have no clue how far apart things are.

I live in suburban London where you can get to a big supermarket in 10 minutes of walking, a train station in 20 minutes and convenience stores are everywhere. You can get anywhere with bus and train in a few hours.

Can someone help a clueless British lemmyposter know how far things are in the US?

EDIT

Here are my walking distances:

• To the nearest convenience store: 250m
• To the nearest chain supermarket: 350m
• To the bus stop: 310m
• To the nearest park: 400m
• To the nearest big supermarket: 1.3km
• To the nearest library: 1.2km
• To the nearest train station: 1km

Straight-line distance to Big Ben: 16km