1) Big Ben is a 96-meter tall tower in London with a large clock that rings every hour. It is named after its creator Benjamin Hall, who was nicknamed "Big Ben".
2) Buckingham Palace is the castle of the Queen of Great Britain, guarded by soldiers in red uniforms and black fur hats. The current queen is Elizabeth Windsor.
3) The London Eye is a large Ferris wheel built in London for the millennium celebrations in 2000, standing 135 meters tall opposite the Houses of Parliament and Big Ben.