Largest single optical telescope

According to Official Guinness Records,

The Gran Telescopio Canarias (GTC) achieved 'first light' on 13 July 2007. Located on the island of La Palma, Canary Islands, Spain, the GTC has a main mirror made up of 36 hexagonal segments giving it a total diameter of 10.4 m (34 ft). The huge telescope and its 35-m (114-ft) dome cost 130 million euros to construct over seven years.

For a complete list of 2007 records, please visit 2007 Guinness Records in Spain.

Related Images

Other Spain records that might interest you:

• Largest cafetière/coffee press
• Oldest person to give birth
• Oldest person to give birth to twins
• Most steps tumbled down in a stunt stair fall
• Largest wine-tasting event