To cross a stream, street or valley (where the delay attributable to a flight of locks at possibly facet can be unacceptable) the valley may be spanned by a navigable aqueduct – a popular instance in Wales is the Pontcysyllte Aqueduct (now a UNESCO Entire world Heritage Internet site) https://musica-infantil90998.aioblogs.com/89867362/the-ultimate-guide-to-urso-fofo