The historic Earnscleugh Station homestead, built in the 1920s, outbuildings and 399ha of land are on the market.
The property, 3km south of Clyde, is owned by Mintago Investments Ltd, which bought it as part of the Earnscleugh flats gold mine development.
The mine, one of the country's largest alluvial gold operations, began operating in 2009 and closed in September last year, the owner citing depressed gold prices and the high New Zealand dollar.
Bayleys Queenstown salesman David Gubb said tenders for the Earnscleugh property closed on December 3.
Because of its design, the homestead building, complete with ramparts, was often referred to as the ''castle'', he said. The two-storey home was designed by Edmund Anscombe and had a Heritage New Zealand category 1 listing.
It was built in the 1920s by the then owner of the property, Steven Spain, and has eight bedrooms, three bathrooms, a billiard room and a formal lounge and dining room.
''In its heyday the castle roof was used to host outdoor balls and parties.''
Stables and staff quarters, built the same red brick and style as the home, sit beside the house.
The property was available as one lot or divided.
There were six other houses on the property as well as a century-old woolshed, a 4ha organic apple orchard and deer shed and yards.
The rateable value (at September 2013) was $6.7million land value and $8.4million capital value. Mr Gubb said considerable interest had been shown in the property so far.
''There's been a number of Southland dairy farmers showing an interest in it for winter grazing, and a few Otago farmers too.
There's been out-of-town people, including some from Christchurch and Auckland, looking at the house for potential tourism ventures and others looking at the land for lifestyle properties or horticulture or viticulture.''
About 120ha of the land had been mined and rehabilitated.
The property also included 87ha of the original 24,600ha Earnscleugh Station, bought in 1862 by Albert Strode and farmed by his future son-in-law, William Fraser, Mr Gubb said.
Mintago is part of the wider L&M group and L&M chief financial officer Shirley Herridge said as well as selling the land, the company was in the process of selling its gold plant from the Earnscleugh mine.
The operation was a major employer, bringing in millions of dollars to the local economy.
Thirty-five staff were employed at the peak of the 24-hour operation and the estimated annual spend was $10million.
