The 294-kilometre corridor linking Vilnius and Riga was once a postal artery of the Grand Duchy, threading manor estates and ecclesiastical waypoints across the Lithuanian-Latvian plain. Today the route remains a showcase of northern Baroque and pilgrimage architecture, with Rundale Palace—Baltic Europe's most intact rococo residence—and the Hill of Crosses, a devotional site where 200,000 wooden and metal crosses carpet a hillock west of Šiauliai, standing as the two anchoring stops most travellers prioritise between capitals. Rundale was commissioned in 1736 by Ernst Johann von Biron, regent of Courland, and designed by Francesco Bartolomeo Rastrelli, whose later portfolio included the Winter Palace in Saint Petersburg. The main block holds 138 rooms, among them the Gold Hall with its trompe-l'œil ceiling fresco by Francesco Martini and a suite of state apartments whose plasterwork and parquetry survived Soviet-era institutional use. The formal garden extends across eighteen hectares in the French manner, quartered by lime allées and centred on a parterre de broderie restored from Rastrelli's original plan. Unlike many Baltic estates dismantled after 1918, Rundale retained both its envelope and its interior programme, making it the region's benchmark for courtly taste in the mid-eighteenth century. The Hill of Crosses accrued its present density over five centuries, though the site's origin is debated—chronicles from the fourteenth century mention a wooden fortification on the same rise, possibly linked to the 1348 uprising against the Teutonic Order. Crosses were planted here as votive offerings following the 1831 and 1863 Polish-Lithuanian uprisings, and again during the Soviet occupation, when authorities bulldozed the hill three times between 1961 and 1973; pilgrims replanted it within weeks each time. By independence in 1991 the count had reached 40,000; today the figure exceeds 200,000, with rosaries, photographs, and inscribed plaques woven through the forest of wooden stakes and wrought-iron crucifixes. Most vilnius to riga day trip itineraries schedule two to three hours at Rundale and one hour at the Hill of Crosses, with total travel time including stops sitting near five to six hours. Jelgava Palace, Rastrelli's largest work by floor area, occasionally appears as a third waypoint; its exterior survives intact, though the interior now houses a university and touring access is limited to the crypt and ceremonial staircase. The routing flexibility—northbound or southbound, private or shared transfer—means the journey functions equally as a one-way repositioning with sightseeing value or a return loop from either capital.