Its urban park is the Wuhlheide, in which is located the to ridable miniature railway Berliner Parkeisenbahn (BPE), used during the East German period by the Young Pioneer Organisation.
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Published by Volk und Wissen until 1950, and then by Verlag Junge Welt, it was the voice of the Free German Youth, targeting Young Pioneers and primary school pupils of the grades 1 to 3.
The phrase has been used more recently for other purposes, such as the 1967 "Friendship Train" from the Ernst Thälmann Pioneer Organisation to the Soviet Union, the 1969 song "Friendship Train" written by Norman Whitfield and performed by Gladys Knight & the Pips, and the "Friendship Train" on which Sergei Abramov led a Chechen delegation to Russia in 2004.