Woolsthorpe - proper name Woolsthorpe-by-Colsterworth - is a very small village in the county of Lincolnshire, near the village of Colsterworth and south of Grantham.
A pleasant if unremarkable place, Woolsthorpe is best known as the birthplace of Sir Isaac Newton (1643 - 1727).
Sir Isaac Newton's home is a traditional 17th century manor-house / farm building that is now owned and operated by the National Trust. it was here that he made many of his very important scientific discoveries (mostly relating to the nature of gravity, the properties of light, and calculus).
Everyone likes to see the very famous apple tree from which an apple is said to have fallen giving him the idea of gravity (or at least a replacement grafted from the original), and there is also a 'discovery centre' where you can make your own scientific discoveries!
(Note: there is also a village called Woolsthorpe-by-Belvoir that is often referred to as Woolsthorpe about 12 kilometres to the north-west)