Find the letters hidden in the picture below, re-arrange them to form a word. To assist we will post clues every few days. Your first clue is.
Clue 1: Sometimes these can be seen in cities and also at the coast.
Clue 2: These can be built out of stone.
Clue 3: There are 2 vowels in this word.
Clue 4: Sometimes you can build these out of sand
Authors Ian and Marie.