On the Wikipedia page for 'Dependent clause,' on the subject of 'Dependent words,' there is provided an example which supposedly presents an adverbial clause, viz., "Wherever she goes, she leaves an item of luggage behind." In this case, "wherever she goes" is said to be the adverbial clause, "wherever" acting as the adverb. It is said that "wherever" is somehow an adverb which modifies "leaves." I don't understand how this is possibly the case. "Wherever," surely, is a noun.
The sentence can be altered in many different ways and maintain the same propositions. E.g., "In going wherever, she leaves an item of luggage behind." "Wherever" is the place that she is "going," and this first clause is certainly dependent, but I don't think that it is adverbial whatsoever; no adverbs exist in the entire sentence. "Wherever (noun) she (pronoun) goes (verb), she (pronoun) leaves (verb) an (determiner) item (noun) of (preposition) luggage (noun) behind (preposition).
Can someone explain how this is possibly an adverbial clause? It is mentioned that "wherever" modifies "leaves," but this is still a place that she is leaving a thing, not that she is leaving her luggage "wherever-ly."