Latvia to Lithuania, another easy day
Riga → Nereta → Vilnius (4h40m, 323km)
Longer option Riga → Nereta → Vilnius → Senoji → Druskininkai (6h30m, 455km)
Kernave Archaeological Site Museum
Walk across a footbridge to see Trakai Island Castle
Musical fountain
Druskininkų piliavietė park and river
Druskininkų senosios kapinės cemetery
Indoor ski resourt (Snow Arena Druskininkai)
Riga → Nereta → Vilnius
Riga → Nereta → Vilnius → Druskininkai (7hr, 488km)