Tetraeder - 4 Things to Know Before Visiting

This 1920s industrial landmark is a former gas tank that was rebuilt after World War II in Oberhausen, Germany. The tank was converted into an exhibition and hosted several large scale exhibitions. It is an important point in the European Route of Industrial Heritage and the Industrial Heritage Trail.

This large former industrial site in the city of Essen is a UNESCO world heritage site since 2001 and one of the important places in the European Route in Industrial Heritage. It was Founded in 1847, and is ranked as the largest of its kind in Europe. Built in the New Objectivity style, it is considered an architectural and technical masterpiece, earning it a reputation as the "most beautiful coal mine in the world".

Founded in April 1949 as Ruhr-Zoo, it is one of the most modern zoological gardens in Germany. It is known for its panoramas and cultural approach. The main attractions are big animals, mostly mammals; The zoo has no aquarium, insectarium, or other smaller animal facilities.

It is a municipal botanical garden located in the Essen city. It was established in 1927 for entertainment, education, and research. Parts of the garden was destroyed in World War II, it was rebuilt and re-designed in 1965.

It is a public park located in Duisburg-Meiderich, designed in 1991. The park was constructed with the intention that it work to heal and understand the industrial past, rather than trying to reject it. The park closely associates itself with the site's past use: a coal and steel production plant that was abandoned in 1985, and the agricultural land it had been before the mid 19th century.

This 12,000 m² open-air exhibition is one of the most visited museums in Germany and the largest mining museum globally. As a research institute, it is a renowned research establishment for mining history. Above-ground exhibitions, and a reconstructed show mine below the museum give visitors insights into the world of mining.