Connecting Budapest’s downtown Vörösmarty Square with the Mexikói Road terminus in eastern Pest, riding the city’s oldest metro line (also referred to as the yellow underground) is an almost unmissable activity in the Hungarian capital, whether taking the Millennium Underground for its historical value – it’s listed as a UNESCO World Heritage Site – or just to get around the city. The subway glides under Andrássy Avenue and stops at significant locations along its subterranean route, including Deák Ferenc Square – where three of Budapest’s four metro lines intersect –, the Hungarian State Opera, the Oktogon intersection, Heroes’ Square, and City Park.