See the Suomenlinna in Helsinki and spend two days in the imperial city of St. Petersburg.
Explore fourteenth-century churches in Tallinn, amble narrow lanes of cottages in Visby, and visit the dunes of the Curonian Spit. Shop the colorful Long Market in Gdańsk.
Seek out Bornholm’s beaches and craggy cliffs, and visit the historic Berlin Wall.
Price: from $4,299 (airfare included from select cities)