GIANT SAND CASTLE: A frozen BMX playground out of sand?

►Watch more bike videos here: Two of Russia’s best BMXers head to the freezing northwest of their country to embark on a unique skatepark build. Four hundred tons of sand and water, frozen to almost concrete-levels of hardness. This was the material chosen to construct a giant skatepark castle on the shores of Lake Ladoga in Northwest Russia. The unusual playground was the brainchild of Kostya Andreev and Irek Rizaev. Ever