Europa Park in Rust, Germany, has revealed details of its €100m (US$136m, £79.2m) waterpark expansion, due to be located 1km (0.6m) from the theme park.

Speaking at a press conference, a spokesperson for the park said a wave simulator, water playground, outdoor beach and a variety of slides would be included in the 30 hectare (74 acre) plans, which are set to be completed for 2016/2017.

While no official designs have been released, the park will feature outdoor and indoor areas, in addition to a new hotel being built specifically for the waterpark. The indoor section of the park will run year-round, while the outdoor area will run dependent on weather from May to September.

“The goal is to extend the length of the stay,” said park owner Roland Mack. “People should stay in the region a day or two longer and that is why we are installing a hotel.”

It is hoped the waterpark addition will attract 400,000 to 600,000 visitors annually, with four out of every five visitors to visit both the theme park and the waterpark.

The plans would be the biggest single addition to the park since its foundation in 1975.