The Archar or Archaritsa is a river in the western Danubian Plain

Danubian Plain (Bulgaria)

The Danubian Plain constitutes the northern part of Bulgaria, situated north of the Balkan Mountains and south of the Danube. Its western border is the Timok River and to the east it borders the Black Sea. The plain has an area of . It is about long and wide.The relief of the Danubian Plain is...

 of northern

Northern Bulgaria

Northern Bulgaria is the northern half of the territory of Bulgaria, located to the north of the main ridge of the Balkan Mountains which conventionally separates the country into a northern and a southern part...

 Bulgaria

Bulgaria

Bulgaria , officially the Republic of Bulgaria , is a parliamentary democracy within a unitary constitutional republic in Southeast Europe. The country borders Romania to the north, Serbia and Macedonia to the west, Greece and Turkey to the south, as well as the Black Sea to the east...

 and a right tributary of the Danube

Danube

The Danube is a river in the Central Europe and the Europe's second longest river after the Volga. It is classified as an international waterway....

. It originates in the western Balkan Mountains

Balkan Mountains

The Balkan mountain range is a mountain range in the eastern part of the Balkan Peninsula. The Balkan range runs 560 km from the Vrashka Chuka Peak on the border between Bulgaria and eastern Serbia eastward through central Bulgaria to Cape Emine on the Black Sea...

 and is around 60 kilometres in length, with a drainage basin

Drainage basin

A drainage basin is an extent or an area of land where surface water from rain and melting snow or ice converges to a single point, usually the exit of the basin, where the waters join another waterbody, such as a river, lake, reservoir, estuary, wetland, sea, or ocean...

 of 364 square kilometres. The river runs through limestone

Limestone

Limestone is a sedimentary rock composed largely of the minerals calcite and aragonite, which are different crystal forms of calcium carbonate . Many limestones are composed from skeletal fragments of marine organisms such as coral or foraminifera....

 terrain and has steep banks, in certain sections up to 100 metres high. The Archar flows into the Danube at the large village of Archar in Dimovo

Dimovo

Dimovo is a town in northwestern Bulgaria, part of Vidin Province. It is the administrative centre of the homonymous Dimovo Municipality, which lies in the eastern part of Vidin Province, 30 kilometres from Vidin at the Danube and 50 kilometres from Bregovo at the Timok River and the Serbian border...

 municipality, Vidin Province

Vidin Province

Vidin Province is the northwesternmost province of Bulgaria. It borders Serbia to the west and Romania to the northeast. Its administrative centre is the city of Vidin on the Danube river. The area is divided into 11 municipalities...

. It also passes through Rayanovtsi, Rabisha

Rabisha

Rabisha is a village in north-western Bulgaria, in Vidin region and Belogradchik municipality.- Geography :Rabisha village is located 45 kilometers from Vidin and 20 km from Belogradchik. It is also located on Archar river. Its population is about 300 people...

, Kladorub

Kladorub

Kladorub is a village in northwestern Bulgaria.It is located in Vidin region , Dimovo Municipality.- History :Kladorub lies upon the remains of an ancient village...

, Ostrokaptsi, Dimovo

Dimovo

Dimovo is a town in northwestern Bulgaria, part of Vidin Province. It is the administrative centre of the homonymous Dimovo Municipality, which lies in the eastern part of Vidin Province, 30 kilometres from Vidin at the Danube and 50 kilometres from Bregovo at the Timok River and the Serbian border...

, Lagoshevtsi and Darzhanitsa.