One of the delights of growing up in Belfast was talking visiting friends to places like Milltown cemetry up the Falls Road with its Republican plot and associated Nationalist history, and who can forget Michael Stones' infamous attack on mourners back in 1988. Now of course black taxi tours of "The Troubles" loyalist and nationalist areas of the city are big business.
If you could spot the next niche market you'd be on to a winner........Howsabout credit crunch tourism with visits to decaying financial services areas and down and out bankers. See also post from 22nd oct last.