Things to see:

Diocleatians Palace

Cathedral and Bell Tower of Saint Dominus 

Krka National Park (45 minutes outside the city but absolutely beautiful)

Grgur Ninski Statue

Croatian National Theatre

Jewish Cemetery- It is about a ten minute walk outside the city. It takes you up a path to where there is a Jewishbuilding that is also a bar with a breathtaking view of the city and port of split with the words “Tziduk HaDin” on it in Hebrew.They have WiFi there.It is a must see if in Split. Afterwards, continuing climbing the hill to go see the Jewish cemetery. 

Restaurants:

Konoba Lučac – family style trattoria very solid order a tuna steak and or fresh calamari(grilled)

Apetit- a fancier restaurant, right next to a grocery store, you need to walk up the steps but its absolutely delicious anything you order. 

Restoran K.užina
Bokeria 
Picasso Pizzeria & Bar

Paradox wine and cheese bar- Ask for Marco (very friendly and informative)

Aged hard cheeses, very intense flavors:

Truffle Cheese Gligoria, Island of Pag

Paški sir gligora, island of pag

Žigljen Gligora, island of Pag

Also, you must try while in Split and in Dubrovnik two types of red wine only made in Croatia(Plavič Mali& Dingâc) and are very full bodied like a Cabernet Sauvignon but with a third dimension of flavor you just don’t get wit California Cab’s. 

Bars:

Academia Ghetto Club
Charlie’s
Vidilica –Phenomenal View
Antique Bar

Rooftop Bars:

Teraca Vidilica
Pool Bar @ the Ambassador
Zoi

Clubs:

Central
Vanilla Club
305