Infrastructure usually follows tourism. So you're limited to two scenarios in my mind.
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As you said, government investment that didn't pan out.
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Popular places that went out of fashion.
For much of the west I can't see much #1. I think you got many of the others.
As for #2, nothing really comes to mind. Reno Nevada maybe. I think Fiji was the exotic one that doesn't get coverage anymore.
Honestly I'm all for multivitamins now. Even eating healthy you're probably not getting everything. 48% of people are magnesium deficient. Take a look at the back and get one that's better than magnesium oxide. *If you're trying to gain, definitely take a multi.