Una Mamea Park, Arboretum in Donji Lapac, Croatia

Una Mamea Park covers 2,060 hectares on the right bank of the Una River in Donji Lapac, Lika-Senj County, Croatia, beside the Štrbački buk waterfall. The protected area was established on 26 April 2010 to conserve the river's travertine barriers and waterfalls, and it adjoins Una National Park on the Bosnian left bank.

Una Mamea Park was established on 26 April 2010 by the municipality of Donji Lapac in Lika-Senj County, covering 2.060 hectares on the right bank of the Una near Štrbački buk. Across the river, Bosnia and Herzegovina declared Una National Park on 29 May 2008. The Croatian park was created to conserve the travertine barriers, waterfalls and hydrological features of the Una's source area.

The park serves as a place where visitors encounter the plant diversity of the region and learn about local natural habitats. People use this space to connect with the landscape and understand the ecosystems of the Una valley.

Una Mamea Park covers 2,060 hectares on the right bank of the Una, beside Štrbački buk waterfall, and the Croatian side is reached from Donji Lapac. The travertine barriers and waterfalls are the main features to look for, so plan for uneven ground near the river. The left bank lies in Una National Park in Bosnia and Herzegovina, and the two areas connect across the border.

The park sits directly adjacent to Una National Park, forming a connected natural reserve across the border between Croatia and Bosnia and Herzegovina. This layout allows visitors to explore different natural settings on short walks.