Question: What is the biggest chocolate model of a series of fortifications made of stone, brick, tamped earth, wood, and other materials, generally  built along an east-to-west line across the historical northern borders of china  housed at World Chocolate Wonderland?
Context: Continental Stove Works, also known as the Buckwalter Stove Company, is a historic factory complex and national historic district located at Royersford, Montgomery County, Pennsylvania.  It consists of 16 contributing buildings and one structure.  The complex was built in two sections: between 1876 and 1924 and 1898 and 1908, some of which are interconnected.  They are generally built of brick with stone foundations.  One of the oldest buildings was built in 1876-1877, and is a 5 1/2-story, brick warehouse measuring 50 feet wide and 96 feet long.  Another was also built in 1876-1877, and is a two-story brick building measuring 39 feet by 50 feet.  The office building was also originally built in 1876-1877, and subsequently expanded to its present three-story size by 1923.  The complex housed a number of regionally important producers of stoves during the late-19th and early-20th century.  After the regional stove manufacturing industry collapsed during the Great Depression, the complex was occupied by a number of warehouses. Rescue Chocolate is a business that sells Chocolate and donates a its proceeds to non-profit animal rescue organizations.  It is a social enterprise business following a similar business model to "Endangered Species Chocolate" and "Newman's Own".  The product line consists of various flavors of dark chocolate bars which are vegan, kosher/parve, and packaged in eco-friendly materials. The Sexton Hotel, also known as Hotel Stuart, is a historical building located in Stuart, Iowa, United States.  The building is a two-story, L-shaped, brick and brick veneer structure that was built in two parts.  The oldest section was a frame building built by John Sexton in 1893 and housed a restaurant.  It was moved to the north and the brick hotel wing was built by Sexton in 1907.  The older structure, now the north wing of the larger building, was covered with brick veneer.  The primary entry into the hotel is located in the canted entrance bay on the southwest corner of the building.  There were 28 guest rooms, and the first floor of the north wing housed the dining hall.  The first floor also housed a large lobby, the owners quarters, and some of the guest rooms. World Chocolate Wonderland (, literally, "World Chocolate Dream Park") is the first chocolate theme park in China.  Located in Beijing to the north of the Bird's Nest, its grand opening was on January 29, 2010.  It houses the world's biggest chocolate model of the Great Wall of China. The Great Wall of China is a series of fortifications made of stone, brick, tamped earth, wood, and other materials, generally built along an east-to-west line across the historical northern borders of China to protect the Chinese states and empires against the raids and invasions of the various nomadic groups of the Eurasian Steppe.  Several walls were being built as early as the 7th century BC; these, later joined together and made bigger and stronger, are now collectively referred to as the Great Wall.  Especially famous is the wall built 220–206 BC by Qin Shi Huang, the first Emperor of China.  Little of that wall remains.  Since then, the Great Wall has been rebuilt, maintained, and enhanced; the majority of the existing wall is from the Ming Dynasty (1368–1644). The Krepost Sveaborg was an Imperial Russian system of land and coastal fortifications constructed around Helsinki during the First World War.  The purpose of the fortress was to provide a secure naval base for the Russian Baltic fleet and to protect Helsinki and block routes to Saint Petersburg from a possible German invasion.  Krepost Sveaborg was part of Peter the Great's Naval Fortress, a coastal fortification system protecting access to Saint Petersburg by sea.  The central part of Krepost Sveaborg was the old fortress of Suomenlinna where the fortress headquarters were located.  Due to technological advances in artillery the old fortress was no longer capable of providing a sufficient protection, and a new main defensive line was built well beyond the old fortress boundaries.  New coastal artillery guns built on outlying islands protected Krepost Sveaborg from the sea, while fortified lines constructed around Helsinki were intended to stop any attacks on land.  The primary coastal guns were 10 in model 1891 guns and 6 in model 1892 Canet guns. Older 11 in model 1877 guns were also used.  In summer 1917 the fortress had two hundred coastal or anti-landing guns, of which 24 were 10-inch guns in six batteries, 16 were 6-inch Canet guns in four batteries and twelve were 11-inch guns in three batteries.  The artillery used in land fortifications included older coastal guns, old fixed carriage guns and newer light field guns.  In March 1917, Krepost Sveaborg had a total of 463 guns, although many of them were obsolescent.  Krepost Sveaborg was still partly incomplete in 1917 when the February Revolution halted most of the construction work.  Some further construction work was carried out during the remaining year, but all work halted during the October Revolution.  Following the Finnish Declaration of Independence, parts of the land fortifications were used in the Finnish Civil War.  The coastal fortifications were later taken over by Finland to protect Helsinki, while the land fortifications were mostly abandoned and disarmed. Ferrero SpA (] ) is an Italian manufacturer of branded chocolate and confectionery products and it is the third biggest chocolate producer and confectionery company in the world.  It was founded in 1946 in Alba, Piedmont, Italy, by Pietro Ferrero, a confectioner and small-time pastry maker who laid the groundwork for Nutella and famously added hazelnut to save money on chocolate.  The company saw a period of tremendous growth and success under Pietro's son Michele Ferrero, who in turn handed over the daily operations to his sons.  His son Pietro (the founder's grandson), who oversaw global business, died on April 18, 2011, in a cycling accident in South Africa at the age of 47.  The Ferrero Group worldwide – now headed by CEO Giovanni Ferrero – includes 38 trading companies, 18 factories, approximately 21,500 employees and produces around 365,000 tonnes of Nutella each year.  Ferrero International SA's headquarters is in Luxembourg.  Ferrero SpA is a private company owned by the Ferrero family and has been described as "one of the world's most secretive firms".  Reputation Institute's 2009 survey ranks Ferrero as the most reputable company in the world.  The recently announced financial results for the fiscal year ending August 31, 2016 showed consolidated sales growth of 8.2% from the previous fiscal year. Chocolate City is a Nigerian record label founded in 2005 by lawyer Audu Maikori along with Paul Okeugo and Yahaya Maikori.  Generally regarded the biggest and most successful indigenous urban record labels in Africa, Chocolate City Music operates as a subsidiary of Chocolate City Group, one of the biggest entertainment conglomerates in Africa.  Other arms of the group are Chocolate City Distribution, Chocolate City Events, Stem Marketing and Chocolate City Media Block paving also known as brick paving is a commonly used decorative method of creating a pavement or hardstanding.  The main benefit of bricks over other materials is that individual bricks can later be lifted up and replaced.  This allows for remedial work to be carried out under the surface of the paving without leaving a lasting mark once the paving bricks have been replaced.  Typical areas of use would be for driveways, pavement, patios, town centres, precincts and more commonly in road surfacing.  Bricks are typically made of concrete or clay, though other composite materials are also used.  Each has its own means of construction.  The biggest difference is the way they set hard ready for use.  A clay brick has to be fired in a kiln to bake the brick hard.  A concrete brick has to be allowed to set.  The concrete paving bricks are a porous form of brick formed by mixing small stone hardcore, dyes, cement and sand and other materials in various amounts.  Many block paving manufacturing methods are now allowing the use of recycled materials in the construction of the paving bricks such as crushed glass and crushed old building rubble. The Songyue Pagoda (), constructed in AD 523, is located at the Songyue Monastery on Mount Song, in Henan province, China.  Built during the Northern Wei Dynasty, this pagoda is one of the few intact sixth-century pagodas in China and is also the earliest known Chinese brick pagoda.  Most structures from that period were made of wood and have not survived, although ruins of rammed earth fortifications still exist.
Answer: Great Wall of China.