This landlocked country has been influenced by various cultures which have all left their mark; to the delight of those who visit what is now one of Eastern Europe's most popular travel destinations. Budapest is bisected by the beautiful Danube River, around which features a beautiful cycle path and a poignant World War II memorial. The city is also home to the world’s largest thermal water cave system, the world’s second largest synagogue and the world's third largest Parliament building. The most famous of the city's thermal spas, Széchenyi Thermal Baths, are an indispensable and relaxing experience like no other. Budapest's outskirts are dominated by beautiful hills and an imposing liberty statue. The complex gives stupefying views of the city. Lake Balaton, Europe's largest freshwater lake, a popular, natural summer retreat and a centre for Hungarian viticulture. Eger, the second city houses fortresses and castles from all those that have invaded and occupied Hungary, as well as beautiful religious artefacts. Near the border with Slovakia is Baradla Cave and the Aggtelek National Park. The caves stretch for 15 miles and details the lives of the regions earliest settlers.