#canals

#canals

Every time a boat passes through a canal lock, thousands of litres of water are released and must be replaced, usually from other sources. To reduce water loss, engineers sometimes build side ponds next to canals with several locks in succession. These side ponds allowed water to be "put aside" rather than lost. When a lock chamber was emptied to lower a boat to the next level, paddles were opened to divert the water into an adjacent side pond.

Think Claude Monet and Paris or Edward Hopper and New York. Those artists never stopped creating scenes that captured the vibrancy-and sometimes the more grotesque side too-of places that remain world capitals today. They both left legacies for others to follow, as one can see wandering around Montmartre or Central Park, spying the many artists with sketch books in hand or seated at easels.