When you are planning a vacation, you spend a lot of time researching the hotels you want to stay in, the places you visit, restaurants, shopping, and other things. You read reviews and experiences of other travelers. Folks at Travel + Leisure asked their readers to rate various hotels based on their location, facilities, food, service, and overall value. Here are the top 10 best hotels in the world in 2018 based on Travel + Leisure's survey.Top 10 best hotels in the worldRemember that this list is not about the most expensive hotels or the most luxurious ones. It's all about hotels that travelers think are best in terms of facilities, food, service, and overall value. So, without further ado, let's check out the top 10 best hotels in the world.10- Nayara Springs, Arenal Volcano National Park, Costa RicaIt scored 97.04 out of 100 in Travel + Leisure's survey. It was also voted the best luxury hotel in 2016 and 2017 in a survey conducted by TripAdvisor. Nayara Springs is located atop a cliff surrounded by tropical gardens and emerald forests. It costs around $750 per night on average, though you can get a room there for as low as $630 in October. The hotel has two giant pools, an award-winning spa, a piano lounge and bar, and a private plunge pool. It also arranges daily adventurous activities such as canyoning and water-rafting.