I've found 11 cultural tours to Bulgaria

From Romania to the North Sea (Expression)

From Romania to the North Sea (Passion)

From Romania to the North Sea with 1 Night in Bucharest (Expression)

Glide past quaint towns, beautiful views, and historic buildings along the Danube, Main, and Rhine Rivers.

From Romania to the North Sea with 1 Night in Bucharest (Passion)

Glide past quaint towns, beautiful views, and historic buildings along the Danube, Main, and Rhine Rivers.

Iconic Rivers of Europe - the Rhine, Main & Danube with 1 Night in Bucharest and 2 Nights in Transylvania (Expression)

From Romania to the North Sea (Impression)

From Romania to the North Sea with 1 Night in Bucharest and 2 Nights in Transylvania (Expression)

Your Danube River cruise takes you to the capitals of three countries: Belgrade, Serbia; Budapest, Hungary; and Vienna.

From Romania to the North Sea with 1 Night in Bucharest and 2 Nights in Transylvania (Passion)

Your Danube River cruise takes you to the capitals of three countries: Belgrade, Serbia; Budapest, Hungary; and Vienna.

From Romania to the North Sea with 2 Nights in Transylvania (Impression)

From Romania to the North Sea (View)

From Romania to the North Sea with 2 Nights in Transylvania (View)