The local city paper had a good article about a city dump in Puerto Vallarata, "a beguiling tourist trap on Mexico’s Pacific coast". An excerpt:

Though it’s not a perspective that you’ll want to savor. The locals call this place "La Basura," meaning literally, "the sweepings," for it is a mountain made of trash. It is the city dump. And as a connoisseur of cities and their refuse, I’ve come to discover what it’s made of. From here, you can survey some of this mountain’s sources. Its garbage arrives from Puerto Vallarta’s old city, where American expats live easily and cheaply — feasting on dividends from former corporate careers. Its trash comes from the rising hotel district, whose walled enclaves swell with honeymooners, and which periodically explodes with kids on spring break. Its garbage comes from the denizens of big cruise ships, who swarm the city for silver bracelets, cheap booze and pricey Viagra — available without a prescription.