Wieliczka, Poland

This 1,073-foot deep salt mine may be a UNESCO World Heritage site, but it's hardly a glitzy expat destination. With falling salt prices and flooding forcing the mine to close down commercial operations in 1996, Wieliczka is a faded industrial town clinging to its mining past. The 1.2 million annual visitors are the lifeblood, drawn to the subterranean chapels and statues carved from rock salt. But beneath the tourist veneer, the bureaucratic hassles of maintaining Poland's "official national Historic Monument" are a persistent headache. Unless you're enamored with the mine's history and don't mind the damp, drafty conditions, Wieliczka is best left to the dedicated salt enthusiasts.