The Budapest Metro is the oldest electrified underground railway system on the European continent, and the second-oldest in the world, predated only by the 1890 City & South London Railway (now part of the London Underground). Its iconic Line 1, completed in 1896, was declared a World Heritage Site in 2002.
More than half of all zinc that is mined today is used for galvanizing. Galvanizing is applying a thin coat of zinc over other metals to prevent them from corroding or rusting. Zinc is also used in many metal alloys.