The Water of Fleet 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 Scotland

Scotland

Scotland is a country that is part of the United Kingdom. Occupying the northern third of the island of Great Britain, it shares a border with England to the south and is bounded by the North Sea to the east, the Atlantic Ocean to the north and west, and the North Channel and Irish Sea to the...

 flowing into Fleet Bay on the Solway

Solway

-Places:New Zealand*Solway, New Zealand, a suburb of MastertonUnited Kingdom*Solway Firth, the inlet between the north west of England and southern Scotland*Solway Moss, lowland peat bog in Cumbria, England, near the Scottish border...

. Its two tributaries are the 'Big Water of Fleet', which begins around Loch Grannoch, and the 'Little Water of Fleet'. The river flows through Gatehouse of Fleet

Gatehouse of Fleet

Gatehouse of Fleet is a town in Dumfries and Galloway, Scotland, which has existed since the mid-18th century, although the area has been inhabited since much earlier...

 before meeting the sea.

The Big Water of Fleet is crossed by a twenty span viaduct

Viaduct

A viaduct is a bridge composed of several small spans. The term viaduct is derived from the Latin via for road and ducere to lead something. However, the Ancient Romans did not use that term per se; it is a modern derivation from an analogy with aqueduct. Like the Roman aqueducts, many early...

, which was once a part of the Portpatrick Railway

Portpatrick Railway

The Portpatrick and Wigtownshire Joint Railway, often known as the Port Road, was a railway in south-west Scotland, which linked Dumfries, via Castle Douglas, with the port towns of Portpatrick and Stranraer...

route.