Delphi is an iconic historical site and was once the sacred precinct of classical Greece, due to its role in Greek myth as the seat of a prophetic oracle.
This capital of Norway has lots of things to offer such as the waterside Norwegian Maritime Museum and the Viking Ship Museum, with Viking ships from the 9th century.
Amsterdam, the 17th century capital of Holland, is often called the "Venice of the North" due to its numerous, boat-navigable canals. Truly rich in history, the oldest part of this populous, multicultural city is Sloten, which dates all the way back to the 9th century.