Glad to hear you are staying overnight. Mostar in the early morning before the stores open their iron doors and set up their wares is a very different place to mid-day. You can wander around and find the local market at the far end of the riverfront street on the Muslim side, stop for coffee on the TERASA rooftop terrace cafe - look up, way up, from the bridge - on the same side -ask at the Cafe Bijeli, as they own it, and will show you the way - up to the busy street, turn right, turn right again into an alley and up the stairs. Best view on the bridge, the river, the mosques, the cobbled streets. Find the museum in the restored Hamam by the river that shows how they restored the bridge and why they created a restored centre of key buildings in hopes of attracting tourists again, and slowly making a living in difficult times. Buy something, anything , in Bosnia, to help them along. The local market, the House of Isfahan full of real goods from the east, local tinsmiths and painters. so much talent, so little money. Slippers and socks, rugs and scarves, whatever. If you want to compare and contrast, visit a mosque and the new cathedral church on the Croat side with its high tower and cross, and consider how cultures that lived together for centuries can suddenly be manipulated, controlled and abused. Mostar is best viewed early and late with less tourist traffic (day trips). A long lunch in Bosnia is time well spent. Talk to locals, they love that you came. Dip your sugar cube in the turkish coffee cup after you pour it, and suck reflectively , then eat the Lukoum. Always eat the sweet stuff.