|Azerbaijan lies on the Caspian Sea between Russia and Iran and is bordered also by Armenia and Georgia. It is rich in oil and gas and the Burning Mountain is a rare natural wonder in the Absheron peninsula that burns all year round due to natural gas escaping from the ground. Tea is the most popular drink in Azerbaijan. It is traditionally served in a pear shaped glass and consumed through lumps of sugar or jam held in the mouth. The oldest known human fireplace was discovered in the Azikh Cave and dates from 700,000 to 500,000 years ago.