B.A.S.E. jumping (Building - Antenna - Span - Earth) was first started some 25 years ago in the U.S.A. First Croat to make a B.A.S.E. jump was Nenad Pesut (a.k.a. The Delegate) in 1989. in Los Angeles, and it was also him who started B.A.S.E. jumping in Croatia. The number of B.A.S.E. jumpers was increasing very slowly, so that today in Croatia there are only five people who do B.A.S.E. jumps: Nenad Pesut (67 jumps), Igor Kecerin (17), Davor Lovrencic (~20), Robert Pecnik (89)and Darko Tupek (4). Tom Begic, an Australian of Croat origin, has also made 12 B.A.S.E. jumps in Croatia.

B.A.S.E. jumping is not legally defined or regulated in Croatia, so jumping a site depends on local police or other authorities only.

This is the list of B.A.S.E. sites in Croatia and Slovenia that were jumped so far:

Buildings:

• Zagrepcanka building in Zagreb
  Height: 94.5 m / 315 ft;
  Landing: difficult
  
• Tresnjevka smokestack in Zagreb
  Height: 190 m / 633 ft;
  Landing: easy
  
• Borovje smokestack in Zagreb
  Height: 190 m / 633 ft;
  Landing: easy
  
• Bakar smokestack near Rijeka
  Height: ~250 m / ~ 750 ft;
  Landing: easy

Antennas:

• Tom Begic jumped an antenna in the village Kriz near Dugo Selo in 1999 using static line. Quote: "it was a VERY LOW static line jump".

Span:

• bridge in Limska draga near Vrsar
  Height: 125 m / 416 ft;
  Landing: easy
  
• Trsat bridge near Rijeka
  Height: 87 m / 290 ft;
  Landing: very difficult - dangerous
  
• Krk bridge
  Height: ~60 m / ~200 ft;
  Landing: water
  
• the new Maslenica bridge near Zadar (T. Begic)
  Height: ?
  Landing: water

Earth:

• Biokovo mountain
  Height: ~150 m / ~500 ft;
  Landing: easy
  
• Sfinga cliff in the Triglav mountains in Slovenia
  Height: 170 m / 566 ft;
  Landing: easy
  
• a cliff in the Paklenica national park (T. Begic)
  Height: ?
  Landing: very difficult - dangerous