Phoenician-era necropolis, 16th-century fortifications, and Posidonia seagrass meadows of the Balearic island. Inscribed 1999.
From Wikipedia
Ibiza, or Iviza, is a Spanish island in the Mediterranean Sea off the eastern coast of the Iberian Peninsula. It is 150 kilometres from the city of Valencia. It is the third largest of the Balearic Islands in area, but the second-largest by population. Its largest settlements are Ibiza Town, Santa Eulària des Riu, and Sant Antoni de Portmany. Its highest point, called Sa Talaiassa, is 475 metres above sea level.