Split is all about Diocletian’s Palace. Diocletian was the only Roman Emperor to live long enough to actually retire and this was his retirement home. Staying within the walls of the Palace is fun because the peristyle with all the Roman architecture ( including the completely intact Roman “Temple of Jupiter”) and other buildings are floodlit at night. It all is a great photo-op.
I have stayed at “Golden Gate Rooms” which consists of several rooms built into the fortified wall overlooking the vestibule of the Golden Gate of Diocletian’s Palace. In 300AD, this area served as the barracks for Roman soldiers charged with protecting the palace.
When you’re ready to take the ferry or catamaran to Hvar, Split’s ferry port is right outside Diocletian’s Palace.
Split’s great municipal beach, Bacvice Beach, is about a 15-minute walk. Good day trips include the town of Sibenik ( 1-hour by bus) and Krka National Park ( 20 minutes beyond Sibenik). Trogir, which is close to Split’s airport, also makes a pleasant excursion with one-hour ferries departing from Split’s ferry port.
On Hvar. I’ve stayed on beautiful Bonj Beach near the Amfora Hvar Grand Beach Resort, It’s about a 15-minute walk from central Hvar Town and the ferry port.
Stari Grad— one of the oldest continuously-inhabited towns on earth with Roman mosaics exposed under the sidewalks— is a 30-minute bus ride from Hvar Town with buses departing from near the supermarket by Hvar’s cathedral.
Have a great trip!