Have you ever wondered what it's like to be homeless?  For those willing to cough up the cash to see the underbelly of a city, there are more chances than ever to live the homeless experience.

While not a new concept, homeless tours—where visitors either get up-close views of places where homeless live or actually immerse themselves in their lifestyle –is a growing trend in Europe and the U.S.  Some of these tours are run by legit organizations and aim to help these marginalized communities.  But they have their critics, with some saying these tours are tantamount to looking at animals in a zoo.

Here are five you may, or may not, want to check out: