Yarborough Leisure Centre

The Lincoln Astronomical Society has public viewing nights in winter. In summer the evening sky is too bright.

Fascinating museum of the area's agricultural, industrial and social history from 1750, housed in a Victorian militia barracks.

The 'east gate' of the Roman city of Lindum Colonia - a fragment of the 3rd century wall and gatetower are still visible

There's been a fort here since Roman times and probably earlier, but the stone castle was begun in 1068 by William the Conqueror. It has a large enclosure within its curtain walls, which from the 18th century was the obvious place to site a court house, jail and gibbet. So it feels Victorian or Georgian, though it holds an original copy of Magna Carta, and its most striking features are the jail museum and apparatus of punishment. The Crown Court is still in use.

Replica stone arch - a reconstruction of the medieval stone gate which led to the cathedral close.

Impressive 14th-century gatehouse by the cathedral west entrance. This was where tenants of church land came to pay rent — lots of them, for it was a big diocese. Their money was counted out on a chequered cloth, and "Exchequer" came to mean the government finance department.