Troubled souls do Prague's underworld tours

Every Friday, Lada leaves her small apartment to take tourists around Prague's underworld.

"I pass on my cautionary tale," said the 54-year-old sex worker as she chain-smoked her way up the central Wenceslas Square.

"At least my ruined life can be useful. I can make a clean breast of it. It's a relief."

Lada, who was homeless for years, is one of six tour guides who work for a social enterprise called Pragulic tackling "myth and prejudice" around people who live on the streets of the Czech capital.

Prague was infamous for its criminal underworld and drug problem in the 1990s. It still has a substantial homeless population of around 4,000, according to its social services.