Discover Efteling, World of Wonders. Efteling is a unique theme park with a fairytale atmosphere, natural surroundings and a wide range of thrilling and enchanting attractions, making it the ideal family short-break destination. Efteling is the largest theme park in the Netherlands, and third largest in Europe and is open all year round. In 2015 Efteling welcomed 4.68 million guests, making it the most visited attraction in the Netherlands. Efteling Theme Park Resort is located in the south part of the Netherlands, only 1 hour and 15 minutes away from Amsterdam.