Not long ago, once you decided to go abroad, travel guide books were the soft and secure option to get prepared and learn things about the country you would visit. But now…? Things are turning more and more wired – or even wireless. This infographic looks at how travel guides have changed over the centuries.

What’s the average reviews per hotel over years? What’s the demographics of the reviewers? Which are the top 10 hotel rating sites? If you are in the hospitality industry you need answers now!