Walk around local area in groups, following clues that lead to places, whose name can be used to build up a single word everyone must discover
Choose a word to discover.
Create sets of important place names in the local area, different ones for each group, whose first letters can be arranged to form the word to discover.
For each place, come up with a clue that describes its significance
Go around local area in groups, following clues that lead to the places and work out the name of the place.
Arrange the first letters of each place name to work out the word to discover.