Wiener Riesenrad is a Ferris wheel in the Prater in Vienna that looks down over the city. About ten people ride in one cabin, and a full turn takes roughly 15 to 20 minutes, with views of the sunset or the night sky. First opened in the late 19th century, it stands 64.75 m tall, and meals can be served inside a cabin with a reservation. In summer the interior gets very hot even though there are small windows.