We were up early again yesterday because Reykjavik Excursions was picking us up at our hotel at 8:30am for the Golden Circle day tour. This is one of their most popular tours, and if you only have a short time in Iceland then it's a good way to see some interesting sights that are fairly close by. This tour takes you about 120 kms (75 miles) inland from Reykjavik, heading pretty much straight east. First stop along the way is a greenhouse where they show you how they are growing their own tomatoes and cucumbers here in Iceland, and they are doing it year round! Iceland is fairly expensive in a lot of ways, but two things that are cheap and abundant are hot water and electricity. So these greenhouses have tapped into the natural hot springs and the water supply keeps the greenhouses at a constant temperature year round. The lighting is all computerized to make use of the short periods of natural daylight that occurs during winter as well as the long days of summer. Computers also control humidity and CO2 which are important for perfect tomatoes. The tomatoes are totally natural and no pesticides of any kind are used.