Riding in royal style

Queen Elizabeth II leaves the Houses of Parliament in the Glass Coach during the State Opening of Parliament on May 25, 2010, in London.

PICTURES: The Queen visits New York

Princess Diana and Prince Charles wave to well-wishers from the 1902 State Landau carriage after their wedding ceremony at St. Paul's Cathedral on July 29, 1981, in London.

PICTURES: Princess Diana's majestic wedding
PICTURES: Royal divorces
PICTURES: Princess Diana

Prince William, right, and Camilla, the Duchess of Cornwall, leave Buckingham Palace in a horse-drawn carriage during the Trooping The Colour, a military parade held to mark the monarch's official birthday, on June 13, 2009, in London.

PICTURES: Prince William and Kate Middleton

Sweden's Crown Princess Victoria and husband Prince Daniel are seen in a carriage after their wedding ceremony on June 19, 2010, in Stockholm.

PICTURES: Princess Victoria's wedding preparations

Queen Rania Al Abdullah of Jordan, left, and Queen Silvia of Sweden ride in a carriage to a welcoming ceremony at the Swedish Royal Palace on Oct. 7, 2003, in Stockholm.

PICTURES: Queen Rania

The Emperor Akihito and Empress Michiko of Japan arrive to a welcoming ceremony in a carriage, where they were greeted by Right Honourable Michaelle Jean, then-Governor General of Canada, and husband Jean-Daniel Lafond at Rideau Hall on July 6, 2009, in Ottawa.

PICTURES: Emperor Akihito

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Thobeka Mabiba Zuma, the wife of South African President Jacob Zuma, leaves by carriage following the ceremonial welcome on Horse Guards Parade on March 3, 2010, in London.

Danish Crown Prince Frederik and his bride Crown Princess Mary Shoot Hoops wave from their carriage during a procession from Copenhagen Cathedral to Amalienborg Palace after their wedding ceremony on May 14, 2004, in Copenhagen, Denmark.

PICTURES: Danish Royals in Washington

Princess Beatrice, right, and Princess Eugenie, daughters of Britain's Duchess of York Sarah Ferguson, ride a carriage down The Mall in front of Buckingham Palace during the Trooping The Colour parade on June 12, 2010, in London.

PICTURES: The young royals
PICTURES: Sarah Ferguson, Duchess of York

Princess Anne, left, and Princess Beatrice arrive by horse-drawn carriage on Ladies' Day at Royal Ascot horse racing meeting on June 19, 2008, in Ascot, England

Queen Elizabeth II and Prince Philip, Duke of Edinburgh, ride in a carriage up The Mall in front of Buckingham Palace during the Trooping The Colour parade on June 12, 2010, in London.

Queen Elizabeth II makes her way from Buckingham Palace to the Trooping The Colour ceremony in an open carriage on Jun 16, 2001, in London.

Norway's King Harald V and Queen Sonja sit in a carriage as they ride down The Mall on their way to Buckingham Palace on Oct. 25, 2005, in London.

British royal couple Prince Edward and Sophie Rhys-Jones wave to well-wishers after their wedding ceremony at Windsor Castle on June 19, 1999, in Berkshire, England.

King Abdullah of Saudi Arabia rides in the Glass Coach with Britain's Queen Elizabeth II (not seen) down The Mall on Oct. 30, 2007, in London.

King Carl Gustaf and Queen Silvia of Sweden arrive by a horse-drawn carriage for the Swedish national day celebrations at the Skansen open-air museum on June 6, 2007, in Stockholm.

Dutch crown Princess Maxima Zorreguieta waves from the Golden Carriage after her wedding to Crown Prince Willem Alexander on Feb. 2, 2002, in Amsterdam.

PICTURES: Dutch prince celebrates

Dutch Queen Beatrix, left, Crown Prince William Alexander and Princess Maxima (behind the Queen) ride in the Golden Carriage from Noordeinde Palace to the Knights Hall on Sept. 16, 2008, in The Hague, South Holland.