Budapest is the most populous city in Hungary and one of the largest cities in the European Union, grasping the two sides of the waterway Danube. Budapest has notable innovation capabilities as a technology and start-up hub, many start-ups are headquartered. Budapest is the highest ranked Central and Eastern European city on Innovation Cities. Budapest is among the most visited cities in the world, the city welcoming more than 4.4 million international visitors each year. Also known as "Little Paris of Middle Europe", Budapest is famous for the monuments reflecting its own 1,000-year-old culture. The Hungarian capital has two sides, Buda and Pest, stretching along the banks of the Danube, representing two different characters of the city. The capital is vibrant and beautiful throughout the whole year; nevertheless, it certainly has a unique charm in the winter, especially during the festive season. The major fascinations in Budapest is the neo-Gothic Parliament, the biggest building in with 268 meters length, containing amongst other things the Hungarian Crown jewels, Castle hill and the Castle District there are three churches here, six museums and a host of interesting building. There are lots of municipal parks and most have playgrounds for children but the most notable and popular park is the City Park. Budapest is crammed with galleries and museums, and there are Roman remains at Aquincum Museum and another historical museum is the House of Terror, hosted in the building that was the venue of the Nazi Headquarters. The culture of Budapest is mirrored by Budapest’s size and diversity. Most Hungarian cultural movements first started in the city and it is an important centre for music, film, theatre, dance and visual art.