BOIL. Put 4 cups of the water and the maple syrup in a medium saucepan. Add cinnamon stick, ginger slices, and allspice berries. Heat until boiling. Remove from heat.
STIR. Stir in the dried hibiscus flowers.
STEEP. Let sit for 20 minutes while the hibiscus steeps. Strain into a pitcher and discard the used hibiscus flowers, ginger, cinnamon, and allspice berries.
ADD. Add remaining 6 cups of water to the concentrate and chill. Alternatively, you can add ice and chilled soda water for a bubbly version. Add lime juice to taste.
SERVE. Pour into a glass and top off with an orange slice.
ENJOY!