Grabovica valley with small Grabovica creek is a special reserve within park, squeezed deep into the mountain, and form a deep canyon between steep cliffs of Čvrsnica mountain.
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To the North - North-West is Vran mountain with its highest peak on 2.074 meters a.s.l. while on the South - South-East is Čvrsnica mountain with its highest peak Ploča at 2.228 meters a.s.l., South is Čabulja mountain with its highest peak at 1.786 meters a.s.l., in the North - North-East is the Doljanka river and in the East is Grabovica valley that stretches to the Neretva river.
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Within the valley is a small village Diva Grabovica, named after a daughter of a local shepherd, and killed by a local nobleman so that she would not be married to another man, except for him.
In 2001 the following Croatian villages from the municipalities of Maglaj and Zavidovići merged with the municipality of Žepče to form one entity with Croatian majority: Adže, Pire, Ponijevo, Matina, Ljubatovići, Grabovica, Čustovo Brdo, Komšići, Radunice, Globarica, Brankovići, Donji Lug, Gornji Lug, Vrbica, Debelo Brdo, Osova, Vinište and Gornja Lovnica.