The Neum coast while being the only one belonging to BiH, most Bosnians travel nearly freely from the Herzegovina area to Croatia daily. From my experience, despite the country not being part of either the EU or Schengen, the border crossing is pretty lax and citizens don't need a visa to enter neighbouring countries.
If you are an EU citizen you don't even need a passport to enter or leave. Just an ID card.
The snowy mountains are incredible! There’s a series of Shiey videos for B&H where he surfs trains, camps and does a pushbike ride through the mountains: https://redirect.invidious.io/watch?v=V9huXurs678
