What is the difference between "Twin bed" and "Double bed"? I'm a little bit lost since they sounds to me the same, but on the searching hotels site there are both appears as two different things. By googling I didn't find a clear answer to my question. At the moment, with my English knowledge it doesn't make sense for me that it is a single bed, because a single bed it's a single bed rather than twin bed. Isn't it?
This is how it looks like in the site that I mentioned above: