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Known locally as Friðarsúlan, Imagine Peace Tower is an imaginary column of search-lights that are flashed from a wishing well on the Viðey Island towards the sky. It is lit an hour after sunset. It is claimed to reach a height of 4000 meters (13123.4 foot) on clear nights. The column is a tribute to singer John Lennon from his wife. It has the words "Imagine Peace" inscribed on the base in 24 languages.
The houses in Reykjavík and the surrounding towns are all heated with geothermal water. Until recently, most of the water has been acquired by drilling close to Reykjavík, even within the city's boundaries. In the 1980s, however, work began on a new power plant close to Þingvellir, around 50km from Reykjavík. The Nesjavellir Power Plant was formally opened in September 1990. The 200 degrees Celsius water is not led directly to the houses in Reykjavík, but used to warm up cold water that then is used for heating, bathing etc. A visit to the power plant is extremely informative, as is designed with its informative value in mind. You can learn about geothermal activity in general and the history of its usage in general as well as getting practical information about this particular power station. The surrounding area is unique and beautiful. Since the building of the plant, the hills and mountains around have been made accessible for hiking and the road 'Nesjavallavegur', between Nesjavellir and Reykjavík is well worth driving along. There are now plans to use the energy in Nesjavellir to produce electricity as well.
Hallgrímskirkja (Hvalfirði) is a small church designed by Sigurður Guðmundsson and Eiríkur Einarssonit. It serves the memory of Hallgrimur Petersson, the pastor between 1651 and 1669. It is a beautiful structure on the Hvalfjörður that has many colorful frescoes that light up the interior. The external facade is simple and elegant. The roof is made of copper.