The Mazaro is a river

River

A river is a natural watercourse, usually freshwater, flowing towards an ocean, a lake, a sea, or another river. In a few cases, a river simply flows into the ground or dries up completely before reaching another body of water. Small rivers may also be called by several other names, including...

 in Sicily

Sicily

Sicily is a region of Italy, and is the largest island in the Mediterranean Sea. Along with the surrounding minor islands, it constitutes an autonomous region of Italy, the Regione Autonoma Siciliana Sicily has a rich and unique culture, especially with regard to the arts, music, literature,...

, Italy

Italy

Italy , officially the Italian Republic languages]] under the European Charter for Regional or Minority Languages. In each of these, Italy's official name is as follows:;;;;;;;;), is a unitary parliamentary republic in South-Central Europe. To the north it borders France, Switzerland, Austria and...

.

The Mazaro river flows 28 km across South-Western Sicily

Sicily

Sicily is a region of Italy, and is the largest island in the Mediterranean Sea. Along with the surrounding minor islands, it constitutes an autonomous region of Italy, the Regione Autonoma Siciliana Sicily has a rich and unique culture, especially with regard to the arts, music, literature,...

, from its source in Rapicaldo, located within the Salemi

Salemi

Salemi is a town and comune in South-Western Sicily, Italy, administratively part of the province of Trapani. It is located in the Belice Valley.-History:...

 city boundaries, to the Mediterranean Sea

Mediterranean Sea

The Mediterranean Sea is a sea connected to the Atlantic Ocean surrounded by the Mediterranean region and almost completely enclosed by land: on the north by Anatolia and Europe, on the south by North Africa, and on the east by the Levant...

 in Mazara del Vallo

Mazara del Vallo

Mazara del Vallo is a town and comune in southwestern Sicily, Italy, which lies mainly on the left bank at the mouth of the Mazaro river, administratively part of the province of Trapani....

.

"Mad sea" phenomenon

The river is characterized by a periodical phenomenon locally known as marrobbio (also known in English

English language

English is a West Germanic language that arose in the Anglo-Saxon kingdoms of England and spread into what was to become south-east Scotland under the influence of the Anglian medieval kingdom of Northumbria...

 as "mad sea"), which consist in rapid and dramatic sea level oscillations seemingly caused by sudden atmospheric pressure changes; similar phenomenons were observed only in a very few other places in the world, including Nagasaki Bay in Japan

Japan

Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...

 (where the phenomenon is known as abiki) and Ciutadella

Ciutadella

Ciutadella de Menorca or simply Ciutadella is a town and a municipality in the western end of Minorca, one of the Balearic Islands . The name means "citadel". It is one of the two main cities in the island, along with Maó.-History:...

 (in Menorca, Spain

Spain

Spain , officially the Kingdom of Spain languages]] under the European Charter for Regional or Minority Languages. In each of these, Spain's official name is as follows:;;;;;;), is a country and member state of the European Union located in southwestern Europe on the Iberian Peninsula...

, where it is called rissaga).