In English, I've found examples of two consecutive adverbial prepositional phrases both modifying the rest of a verb group, e.g.,
"He won't go out of the town because of the animals."
"She won't stay in the town because of the people."
I've found examples of two or more adnominal prepositional phrases, the first of which modifies the rest of an NP with the second and subsequent phrases modifying the nominal complement in the previous prepositional phrase. e.g.,
"the bear behind the shed near the rock opposite our garage"
"the squirrels in the branches above the car with those old-fashioned fins"
But I haven't found any example of an adverbial prepositional phrase modifying another prepositional phrase in the same sense that, for example, a word for "strangely" could modify a word for "quickly" in some language other than English to produce a phrase that means "with strange quickness".
I'm asking this question to help me develop my conlang, in which the distinction between adnominal and adverbial prepositional phrases is marked grammatically.