Question: In which town in Scotland can the New Slains Castle and Old Slains Castle be found? 

Context paragraphs:
Rowallan Castle: Rowallan Castle is an ancient castle located near Kilmaurs, about 5 km north of Kilmarnock, East Ayrshire, Scotland.  The castle stands on the banks of the Carmel Water, which may at one time have run much closer to the low eminence upon which the original castle stood, justifying the old name Craig of Rowallan.  Elizabeth Mure (died before May 1355) was mistress and then wife of Robert, High Steward of Scotland, and Guardian of Scotland (1338–1341 and from October 1346), who later became King Robert II of Scotland.  She may have been born at Rowallan.

New Slains Castle: Slains Castle, also known as New Slains Castle to distinguish it from nearby Old Slains Castle, is a ruined castle in Aberdeenshire, Scotland.  It overlooks the North Sea from its cliff-top site 1 km east of Cruden Bay.  The core of the castle is a 16th-century tower house, built by the 9th Earl of Erroll.  Significant reconstruction of the castle has been carried out a number of times, lastly in 1837 when it was rebuilt as a Scots Baronial mansion.  At one time it had three extensive gardens, but is now a roofless ruin.  Plans to restore the castle have been on hold since 2009.

Aboyne Castle: Aboyne Castle (historical name: castrum de Obeyn; alternate names: Castle Of Aboyne or Aboyne Castle Policies; also Bonty Castle or Bunty Castle) is a 13th-century castle in Aberdeenshire, Scotland 0.75 mi north of the town of Aboyne (Grid Reference NO5299).  The location of Aboyne Castle was selected for its strategic position near the River Dee and controlling the northern end of one of the Mounth crossings.  Aboyne Castle was formerly derelict, but was restored by the present Marquess of Huntly in 1979.

Findlater Castle: Findlater Castle is the old seat of the Earls of Findlater and Seafield, sitting on a 50 ft -high cliff overlooking the Moray Firth on the coast of Banff and Buchan, Aberdeenshire, Scotland.  It lies about 15 km west of Banff, near the village of Sandend, between Cullen and Portsoy.  The cliffs here contain quartz; the name "Findlater" is derived not from Norse as earlier stated here, but from the Scots Gaelic words "fionn" ("white") and "leitir" ("cliff or steep slope").  The first historical reference to the castle is from 1246.  King Alexander III of Scotland repaired this castle in the 1260s in preparation for an invasion by King Haakon IV of Norway.  The Vikings took and held the castle for some time.  The castle remains that are still there are from the 14th-century rebuilding, when the castle was redesigned based on the Roslyn Castle model.

Balloch Castle: Balloch Castle is an early 19th-century country house situated at the southern tip of Loch Lomond, in West Dunbartonshire, Scotland.  Balloch was a property of the Lennox family from the 11th century, and the old castle was built in the 13th century.  In the 19th century the estate was purchased by John Buchanan of Ardoch, who demolished the ruins of the old castle and erected the present building.  The Tudor Gothic architecture is the work of Robert Lugar.  In 1915 Balloch was bought by Glasgow City Corporation, and has been leased by West Dunbartonshire Council since 1975.  The estate was designated as a country park in 1980, and since 2002 has been part of Loch Lomond and The Trossachs National Park.  Although the house has been periodically used for visitor facilities and council offices, it is now included on the Buildings at Risk Register.  Balloch Castle is a category A listed building, and the estate is included on the Inventory of Gardens and Designed Landscapes in Scotland.

Caerlaverock Castle: Caerlaverock Castle (from "caer laverock", "lark castle") is a moated triangular castle first built in the 13th century.  It is located on the southern coast of Scotland, 11 km south of Dumfries, on the edge of the Caerlaverock National Nature Reserve.  Caerlaverock was a stronghold of the Maxwell family from the 13th century until the 17th century when the castle was abandoned.  It was besieged by the English during the Wars of Scottish Independence, and underwent several partial demolitions and reconstructions over the 14th and 15th centuries.  In the 17th century, the Maxwells were created Earls of Nithsdale, and built a new lodging within the walls, described as among "the most ambitious early classical domestic architecture in Scotland".  In 1640 the castle was besieged for the last time and was subsequently abandoned.  Although demolished and rebuilt several times, the castle retains the distinctive triangular plan first laid out in the 13th century.  Caerlaverock Castle was built to control trade in early times.

National Museum of Wildlife Art: The National Museum of Wildlife Art (NMWA) is a museum located in Jackson Hole, Wyoming, United States that preserves and exhibits wildlife art.  The 51,000 square foot building with its Idaho quartzite façade was inspired by the ruins of Slains Castle in Aberdeenshire, Scotland and echoes the hillside behind the facility.  Located on a bluff called East Gros Ventre Butte in the midst of a real wildlife habitat, the institution overlooks the National Elk Refuge and is situated 2.5 miles north of the town of Jackson.  The core of the collections reflects traditional and contemporary realism.  The Museum's centerpiece is a collection of works by Carl Rungius (1869-1959) and Bob Kuhn (1920-2007).  In addition to 14 galleries, the museum has a Sculpture Trail, Museum Shop, Restaurant, Children’s Discovery Gallery, and Library.  More than 80,000 people visit every year, and over 10,000 children visit the Museum each year, often as part of their school curricula.

Seagate Castle: Seagate Castle is a castle in North Ayrshire, in the town of Irvine, close to the River Irvine, Scotland.  The castle was formerly a stronghold, a town house, and later a dower house of the Montgomery Clan.  The castle overlooks the oldest street in Irvine, which was once the main route between the town and the old harbour at Seagatefoot, which by 1606, was useless and abandoned due to silting.  The remains of the castle are protected as a scheduled ancient monument.

Old Slains Castle: Old Slains Castle (otherwise known as Old Castle Slains) is a ruined castle near Collieston in Aberdeenshire, Scotland.

Slains Castle: Slains Castle may refer to one of two ruined castles in Aberdeenshire, Scotland:

Supporting paragraphs: New Slains Castle Old Slains Castle
Answer: Aberdeenshire