Gediminas' Tower is a historic castle tower located on Gediminas Hill, which houses a museum showcasing historical artefacts. It's a significant symbol of Lithuania, originally built by Grand Duke Gediminas in the 13th century, the brick castle was completed in 1409. The tower also offers panoramic views of Vilnius Old Town from the top.
It's open between 10am - 8pm and costs €8 for an adult ticket.