Complex sentence: The estate was substantially renovated by Ferguson and the following two generations of his family, and at the height of its development in the 18th and 19th centuries the property had several extravagant features, including a two-mile racecourse, an artificial lake and an observatory.
Split into simpler sentences: The estate was substantially renovated by Ferguson and the following two generations of his family. At the height of its development in the 18th and 19th centuries the property had several extravagant features including a two-mile racecourse, an artificial lake and an observatory.