1) Inclined tower 
[tower] De Oldehove is an unfinished church tower in the medieval centre of the Dutch city of Leeuwarden. It leans more than the tower of Pisa in Italy. Oldehove is also the name of an artificial mound (`terp` in Dutch) on which in the late 9th century a (Catholic) church dedicated to Saint Vitus was built. Construction of the adjoining Lat...