Investors have put $100 million into this travel media start-up — here's why it's so hot

Culture Trip is a London-based website started in 2011 by former psychiatrist Kris Naudts, who claims almost 20 million people visit it each month — and that figure is growing. Compare that with Conde Nast Traveller (3.4 million) and Lonely Planet (around 17 million) and it already looks like a success story.