For doomsday theorists, Dec. 21, 2012 could mean the end of civilization, according to some interpretations of the Mayan calendar. But for some tour operators and property owners, the end of the world also means a chance to cash in on the apocalypse hype. In the most prominent countries of the Mundo Maya – Mexico, Belize, Guatemala, and parts of Honduras and El Salvador – the tourism industry is gearing up for a record year, with dozens of Maya-themed offerings designed to lure visitors. The Guatemalan city of Tapachula will feature an 8-foot digital count-down clock in its main park,...