Andrássy Avenue – upon which construction began in 1872 and which was ceremoniously opened in 1885 – and its historic surroundings were inscribed on the World Heritage List in 2002. The Avenue is the pinnacle of eclectic architecture from a time when Budapest was becoming a metropolis; it is a virtual gallery of architectural styles from the second half of the 19th century. The Neo-Renaissance style dominates, but one may find examples of  Neo-Baroque, Classicist, Art Nouveau and Romantic buildings as well. Andrássy Avenue represents the link between the city’s dinamic downtown and the greenery of the City Park. The connection is suggested by the Avenue’s three sections: it begins as a wide downtown through fare bounded by apartment blocks; then gradually becomes wider, more peaceful and greener; and finally leads into Heroes’ Square as an allée of trees bordered by villas. The pride of the Avenue is the Millennium Underground Railway, the first subway on the continent and the second in the world.