In a medium-sized saucepan, bring the 4 cups of water to a boil over medium-high heat.
Once the water is boiling, add the dried lemon verbena, mint leaves, chamomile flowers, and the cinnamon stick.
Reduce the heat to low and let the mixture simmer for about 10 minutes, allowing the flavors to infuse.
After simmering, remove the saucepan from the heat and let it steep for an additional 5 minutes.
Using a fine mesh strainer, strain the tea into a teapot or serving jug, discarding the solids.
Add honey to sweeten, if desired, and stir well.
Pour the tea into cups and garnish with lemon slices if you like.
Enjoy your Costa Rican herbal tea warm, or let it cool to serve over ice for a refreshing cold version.