A tree with a distinctively refreshing smell, the eucalyptus grows naturally throughout Australia, the Philippines, and Papua New Guinea. It has since been cultivated in the rest of the world, including the Americas and most parts of Asia, where it is revered for its medicinal properties. Eucalyptus leaves are the favorite food of koalas, but they also make a smooth tasting tea for humans. Not only is eucalyptus tea beneficial for anti-bacterial purposes, but it can also be used for sinus infections and clearing up general nasal congestion. Eucalyptus is also a common ingredient in cough drops or other lozenges for sore throats, but its oil must not be ingested directly. Aside from this, it is not uncommon for the leaves or bark to be used for making a tea.