Many houses in Prague have a symbol of some kind on the door, often an animal. This house near the Malastrana end of the Charles Bridge has a star. The original has the star painted in the same colour as the wall, but I recoloured it using coloured pencils (more correctly, colours sampled from the web page of a famous brand of coloured pencils). As appropriate for pencils, I sharpened the points a bit.
The waterlily is in a pond on the campus of the University of Exeter.