The driver will pick you up from Vilnius hotel for your private transfer to Riga with the visit of two highlights. Firstly, you'll have a stop at the Hill of Crosses, a 2 hours drive from Vilnius, and is a unique place, included in the Unesco World Heritage list.
Explore the hill by yourself, having around 45 minutes to walk around. Continue to Rundale Palace, which takes around 1 more hour. Once there, you will be greeted by a local guide, who'll show you around the Palace, which used to be the summer residence of the Duke of Courland.
After the Rundale tour, your driver will take you to Riga and drop you off at your hotel.