The London Eye,the worlds largest observation wheel is 135 metres high.The wheel carries 32 air-conditioned passenger capsules.Each capsule accomodates up to 25 people.The wheel provides a 30 minute,slow-,moving FLIGHT over London and gives visitors a unique view of the city.

Big Ben - Popularly called the clock tower of Westminster Palace. The official name of the tower from 2012 - Tower Elizabeth (born Elizabeth Tower.) [1].

Initially, "Big Ben" is the name of the largest of the five bells, but often include the name and to the clock and the clock tower itself as a whole [2].

At the time of the casting of Big Ben was the largest and heaviest (13.7 ton) bell of the United Kingdom

The Washington Monument is an obelisk on the National Mall in Washington, D.C., built to commemorate George Washington, once commander-in-chief of the Continental Army and the first American president. Located almost due east of the Reflecting Pool and the Lincoln Memorial,[1] the monument, made of marble, granite, and bluestone gneiss,[2] is both the world's tallest stone structure (excluding brick) and the world's tallest obelisk, standing 554 feet 7 

1132 inches (169.046 m) tall according to the National Geodetic Survey (measured 2013–14) or 555 feet 5 

18 inches (169.294 m) tall according to the National Park Service (measured 1884)

The Lincoln Memorial is an American national monument built to honor the 16th President of the United States, Abraham Lincoln. It is located on the western end of the National Mall in Washington, D.C., across from the Washington Monument. The architect was Henry Bacon; the designer of the primary statue – Abraham Lincoln, 1920 – was Daniel Chester French; the Lincoln statue was carved by the Piccirilli Brothers;[2] and the painter of the interior murals was Jules Guerin. Dedicated in 1922, it is one of several monuments built to honor an American president. It has always been a major tourist attraction and since the 1930s has been a symbolic center focused on race relations.