The first spot was :The London Eye ,

is a giant Ferris wheel on the South Bank of the River Thames in London. It is Europe's tallest Ferris wheel, is the most popular paid tourist attraction in the United Kingdom with over 3.75 million visitors annually, and has made many appearances in popular culture.The London Eye was designed by the husband-and-wife team of Julia Barfield and David Marks of Marks Barfield Architects.

The London Eye was formally opened by then Prime Minister Tony Blair on 31 December 1999.

After the London eye I saw: The Big Ben

Big Ben is the nickname for the Great Bell of the clock at the north end of the Palace of Westminster in London and is usually extended to refer to both the clock and the clock tower. The official name of the tower in which Big Ben is located was originally the Clock Tower, but it was renamed Elizabeth Tower in 2012 to mark the Diamond Jubilee of Elizabeth II.

  Buckingham House,

the building at the core of today's palace was a large townhouse built for the Duke of Buckingham in 1703 on a site that had been in private ownership for at least 150 years. It was acquired by King George III in 1761 as a private residence for Queen Charlotte and became known as The Queen's House. During the 19th century it was enlarged, principally by architects John Nash and Edward Blore, who constructed three wings around a central courtyard. Buckingham Palace became the London residence of the British monarch on the accession of Queen Victoria in 1837.

Well, we are already in Washinton.

Washington, D.C.

formally the District of Columbia and commonly referred to as Washington or D.C., is the capital of the United States.Founded after the American Revolution as the seat of government of the newly independent country, Washington was named after George Washington, first President of the United States and Founding Father.Washington is the principal city of the Washington metropolitan area, which has a population of 6,131,977. As the seat of the United States federal government and several international organizations, the city is an important world political capital. Washington is one of the most visited cities in the world, with more than 20 million annual tourists.