In a town with two Class-I railroads and a meandering river, you're gonna need a few to get where you wanna go. When you find your first cache, you'll get coordinates to your second stop. But stay your temptation, the sign says closed! Head Eastbound and around; there's more engineering marvels in your future!
And we've got a question for you: Do you know what happens to concrete when the rebar inside is exposed to air and water and begins to rust? It's a spalling affair. When you arrive, look closely and you'll see first-hand examples. Let's hope your second stop sees better care than your first or you'll soon see a 'closed' sign here, too.
Also, keep an eye out for historic plaques; they may contain clues that secure your path forward ;)
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