backdrop background blue calm clouds europe fresh friesland holland lake landscape Netherlands peace sky Sneek Snekermeer spring summer sunny Terherne warm water wide wind agriculture cloud corn corn field cornfield farming field golden holidays nature Poland romantic vacation wheat wheat field communication electric iron journey pebbles post pylons rail rails railway railways rocks semaphore signal Signals stones train trains transportation travel voyage weather arable barley cable cables cereal crop grass green grow growing horizon oats perspective pole telegraph transmission windy