Retovje Springs

 
Retovje Springs is a group of springs that join to form the Big Ljubljanica River ().
Name.
The name "Retovje" and names like it (e.g., "Retje", "Dolnje Retje") are derived from the Slovene common noun "retje" 'powerful karst spring' from the root "*vrětje" 'springing, gushing'. The generic term "okence" in the Slovene name of two springs at the site is a diminutive of the common noun "okno" (literally, 'window') in the secondary meaning 'spring, place where groundwater surfaces'.
Geography.
The springs are located in the Retovje Valley, a steephead valley near Verd south of Vrhnika. The springs include:
Big Spring and Little Spring are the two most powerful springs in the group. After almost 1 km, the Big Ljubljanica joins the Little Ljubljanica () to form the Ljubljanica River.
Exploration.
The karst springs and sumps at Retovje were first studied in 1939 by the Kuščer brothers. Big Spring has been explored to a length of 270 m and a depth of 25 m, and Little Spring to a length of 305 m and depth of 45 m.