Question: In what city do you find a a railway halt near a Castle overlooking the Firth of Clyde?

Context paragraphs:
Emmersbæk railway halt: Emmersbæk railway halt (Danish: "Emmersbæk Trinbræt" ; previously Terpet railway halt) is a railway halt serving the southern part of the town of Hirtshals, Denmark.

Culzean Castle: Culzean Castle ( , see yogh; Scots: "Cullain" ) is a castle overlooking the Firth of Clyde, near Maybole, Carrick, on the Ayrshire coast of Scotland.  It is the former home of the Marquess of Ailsa, the chief of Clan Kennedy, but is now owned by the National Trust for Scotland.  The clifftop castle lies within the Culzean Castle Country Park and is opened to the public.

Saphan Chulalongkorn Railway Halt: Saphan Chulalongkorn Railway Halt is a railway halt located in Na Mueang Subdistrict, Ratchaburi City, Ratchaburi.  it is located 100.141 km from Thon Buri Railway Station.  It is adjacent to Chulalongkorn Bridge, of which the halt is named after.

Grønholt railway halt: Grønholt halt is a railway halt near the village of Grønholt near the town of Hillerød in North Zealand, Denmark.

Kongsvang railway halt: Kongsvang railway halt was a railway halt serving the district of Viby in the city of Aarhus in Jutland, Denmark.  The railway halt is located on the Odder Line between Aarhus and Odder Line.  In 2016, the station was temporarily closed along with the Grenaa Line while it's being reconstructed to form part of the Aarhus light rail system.

Balchriston Level Crossing Halt railway station: Balchriston Level Crossing Halt was a railway halt near Culzean Castle, South Ayrshire, Scotland.  The halt was part of the Maidens and Dunure Light Railway.

Sanam Chandra Palace Railway Halt: Sanam Chandra Palace Railway Halt is a railway halt located in Phra Pathom Chedi Subdistrict, Nakhon Pathom City, Nakhon Pathom.  It is located 49.798 km from Thon Buri Railway Station.  It is located near Sanam Chandra Palace, and used to have a royal pavilion, however this was moved to Hua Hin Railway Station.

Hovmarken railway halt: Hovmarken railway halt is a railway halt serving the eastern part of the railway town and suburb of Lystrup north of the city of Aarhus in Jutland, Denmark.  The halt is located on the Grenaa Line between Aarhus and Grenaa.  The train services are currently operated by the railway company DSB which runs frequent local train services between Aarhus and Grenaa as part of the Aarhus Commuter Rail service.

Dore and Totley railway station: Dore and Totley railway station (named Dore railway station from 1971 until 2008) is a small, one platform railway halt near the Sheffield suburbs of Dore and Totley in South Yorkshire, England 4+3/4 mi south of .  The station is served by the Northern service between Sheffield and Manchester, East Midlands Trains service from Liverpool to Norwich and the TransPennine Express service between Manchester and Cleethorpes, all three running via the Hope Valley Line.

Morebath Junction railway station: Morebath Junction Halt was a railway halt near the junction of the Devon and Somerset Railway and Exe Valley Railway in Devon, South West England.

Supporting paragraphs: Balchriston Level Crossing Halt railway station Culzean Castle
Answer: South Ayrshire, Scotland