Rioolrat, Indoor roller coaster at Avonturenpark Hellendoorn, Netherlands.
Rioolrat is an indoor roller coaster at Avonturenpark Hellendoorn that travels through dark tunnels with green laser projections on the ceilings. The track winds through sewer-themed passages with sudden sharp turns throughout the route.
The ride was designed and built by Vekoma in 1996 as a replacement for an earlier coaster in the same building. The previous version had been constructed by Zierer and occupied the same space.
The ride uses a sewer theme inspired by Paris underground systems, which adds an unusual educational layer to the experience. Visitors notice how the theming connects everyday infrastructure with adventure, making the familiar feel fascinating.
Riders must be at least 100 centimeters (39 inches) tall to ride this coaster. The ride operates with good hourly capacity and is easy to find within the park layout.
During the ride, the track briefly exits the building and passes through an outdoor tunnel before returning indoors. This unexpected shift creates a surprising moment that breaks up the otherwise enclosed indoor experience.
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