What well-known travel destination can still be considered a relative bargain?

I went to Istanbul two years ago and the prices at restaurants and hotels were more than acceptable. Now, when I check menu prices online and hotel reservation sites, the everything seems to be doubled. Hagia Sophia was free when I visited, but now it's 25 euros per person. I don't remeber how expensive Topkapi palace was, but it was nowhere near 42 euros.

Same with other, more exotic destinations, like Bali. Prices were fine for the most part when I visited, but now when I look online, most people say costs have skyrocketed ( although I'm sure the North of the island is still fantastic value for money ) . Which leads to my question. What other well-known and popular travel destinations, with a developed tourist sector, regardless of continent, can still be considered excellent value for money? Bali for example I thought was a good example in this sense. Very popular, strong tourism-industry focus, while still, for the most part, affordable. I am not really talking about hidden gems like Cambodia, but fully-fledged sort-of-mainstream destinations that combine a strong tourism sector with affordable prices.