Private Tour: Split Day Trip from Dubrovnik. Take a ride up the Dalmatian Coast to the seaside town of Split, Croatia's second biggest city, and home to the astonishing Diocletian's Palace, a 1,700-year-old erstwhile palace of a Roman emperor. This full-day guided trip is a great way to see a little bit more of Croatia while you're in Dubrovnik. Stroll the streets of Split, learning about its history, and seeing sites like Republic Square and the Cathedral of St. Domnius, among other great sites. Book this Tour and Save 15% Off Private Tour: Split Day Trip from Dubrovnik.