The possessive form is 'the hotel's towels'.
The sentence "the towels of the hotels" contains no possessive noun. If however you rewrite the sentence as "the hotels' towels" then the possessive noun is hotels'.
The towels of the hotels (plural towels and plural hotels) is the hotels' towels.
The towels of the hotel = the hotel'stowels.
The towels of the hotels (plural towels and plural hotels) is the hotels' towels.
The possessive form is the hotel's towels.
The towels of the hotel = the hotel's towels.
The hotel's towels are nice
Yes, hotels typically provide towels for guests during their stay.
The possessive singular noun is explorer's. The possessive plural noun is explorers'.
The possessive form for the noun coyote is coyote's.
The possessive form of zoo is zoo's.
The possessive form for the noun preacher is preacher's.