The world's 25 cheapest places to travel

Istanbul, Turkey

With one foot in Europe and the other in Asia, Istanbul is undeniably alluring. Though seeing all the major sights – the Aya Sofya, Blue Mosque and Topkapi Palace to name but a few – can quickly eat into your lira, the city can still be great for tighter budgets. Arguably the best ways to really soak up the city are from a Bosphorus ferry, wandering the streets of the Grand Bazaar, or on a streetside terrace with a freshly-cooked kebab.