There are many places all over place to get article ideas. Part 1 of this series explored some of locations on internet. This part goes into some of places you can find ideas outside of web.
Libraries - Believe it or not, libraries still exist and are going string. In fact, there are dozens of libraries in just about every major cities, and most towns have at least one. Even town where I grew up, Lake Arrowhead, California, had a small public library.
Libraries are great places to get ideas for articles. I like to just visit and wander up and down isles, looking at titles, occasionally opening a book and flipping through pages. It's rare that I don't walk away with at least one or two ideas which turn directly into articles.
Botanical Gardens - A few miles from my house is one of best places on planet - Huntington Library. This is an awesome collection of art museums and displays which is not equaled anywhere in world (at least in my humble opinion). One of things that makes this magical place even more enjoyable is surrounding botanical gardens.
The library gardens are divided up into different habitats, duplicating most of major environments of planet. I've spent many enjoyable hours wandering through place, just looking at plants and environments, getting dozens and dozens of article ideas.
Something about gardens relaxes my mind and causes thinking process to become calmer and more organized. Ideas just seem to float up to surface, waiting for me to just pluck them up and convert them into articles.
Museums - Of course, museums are excellent places to get article ideas. I have pleasure of living just a few miles from a number of excellent museums including La Brea tar pits (dinosaur and extinct animal articles), Air And Space Museum (obvious), Museum of Science and Industry (technology articles), Natural History Museum (thousands of article ideas just waiting to be found) and art museums galore.