Eternal city historic
Vatican, Sistine Chapel
Balsamic Vinegar tasting
Arctic Adventures
Northern Lights spectacle
Lake Geneva scenic
Lucerne old town
Guinness Experience brewery
Irish myths, legends
Citadella panoramic view
Parliament building visit
Anne Frank House
Antoni Gaudi's art
British history landmarks
For those who have extra time, consider adding a day trip to Pompeii (2 hours train ride from Rome). In Budapest, try the delicious street foods at the Great Market Hall or take a dip at the Széchenyi Thermal Bath & Spa. If time is limited or you prefer to avoid long distances, consider removing the Northern Lights adventure since it will take two entire days of travel.