British Museum

Probably the most colourful event in the UK's legislative calendar, this takes place in May or June every year, or after a general election, when the King travels to the Houses of Parliament to open the new parliamentary session. During this event, the Lords, Speaker of the House of Commons, and other office holders can be seen dressed in their ceremonial robes, and there is always an elaborate procession when the King makes his way to the Houses of Parliament from Buckingham Palace. This is one of the few occasions where all branches of the British government are gathered in the same place. Many traditions of the State Opening can trace their origins to a more turbulent past, when the relationship between the monarch and Parliament was sometimes antagonistic. In particular, since the English Civil War, the monarch has been banned from entering the House of Commons chamber, and instead must send a representative (the Black Rod) to summon the MPs to the Lords chamber, where he delivers his speech. Another notable tradition is the holding of a Hostage MP in Buckingham Palace, ostensibly to guarantee the safe return of the monarch, who is released once the King has returned to the palace safely after delivering his speech. While attendance at Parliament itself is limited to special guests that have been invited by the Prime Minister, it is broadcast live on the BBC, and you can also view the King's procession from Buckingham Palace to Parliament from the roadside for free.

There are three notable outdoor bathing ponds on the heath. The Men's Pond and Women's Pond are both part of the line of small lakes on the eastern edge of the heath known as Highgate Ponds, and the Mixed Pond is part of Hampstead Ponds on the opposite side. Swimming hours are seasonal, complicated, age-dependent and change frequently, so it is worth checking before making a special trip.

The largest square in London. It was established in 1806 by the 5th Duke of Bedford and his statue can still be seen in the square. There is also a café.

A neoclassical church that stands opposite the National Gallery. Since World War I, the homeless have sought shelter at this church, a tradition that continues to this day.

This enormous arch was built in front of Buckingham Palace. In 1851 the expansion of the palace meant the arch could no longer remain where it was, so it was moved to this point on Hyde Park. It now stands rather sadly on a large traffic island, but the subway beneath the roads means you can stop off at the Marble Arch on your way from Oxford St to Hyde Park.

A stone howitzer by World War I veteran Charles Sargeant Jagger

Designed by one of Britain's leading architects, Sir Norman Foster, this curved glass skyscraper was the 2004 recipient of the Stirling Architectural Prize for Best Building. It was built on the site of the Baltic Exchange building, destroyed in 1992 by an IRA bomb which killed three. On the Bury Street side of the Gherkin by some black stone benches is the Tomb of the Unknown Girl for a teenaged Londoner who died 1,600 years ago (see infobox above), marked with a marble laurel wreath and inscription. Searcy's Restaurant (from £50) at the top takes bookings up to five weeks in advance and you have to go through security before going up.

This gallery houses the Tate collection of British art from 1500 through to contemporary art. A side wing collects together the gallery's collection of paintings by Turner, including some stunning seascapes. Temporary exhibitions are exceedingly varied: examples include exhibitions of Turner's paintings of Venice and the work of photographer Wolfgang Tillmans. The best known exhibition is the Turner Prize, consists of works by four artists shortlisted for the annual contemporary art prize, which runs from late October to January each year.

Dr Samuel Johnson was the highly distinguished 18th-century "man of letters", best known for his comprehensive English Dictionary of 1755, but also for his prolific output of poems, essays and novels. Something of a "hidden gem", this small, independent museum is dedicated to him—and, with its historic interiors, paintings and prints, personal effects and other exhibits—gives an impression of what it might have been like during his occupancy from 1748 to 1759. Built in 1700, this impressive period building—a rare example of its kind in the area—survived the brutal onslaught of the Blitz during World War II and is now maintained in excellent condition.

This steel pedestrian bridge connecting Bankside with the City of London has all the lovely views of the Thames that you'd expect, but most of those who cross Millennium Bridge never notice its most distinctive feature. The bridge is dotted with hundreds of tiny paintings, so small that you'll probably miss them under your feet if you're not looking for them.

Site of the London residences for the Prime Minister (No. 10) and the Chancellor (No. 11).

Historic home to English kings such as Henry VIII, now open to the public. There are many attractions which can occupy a whole day visit, including 60 acres of gardens with the famous maze, the Tudor kitchens, the Chapel Royal, the Great Hall, Mantegna's Triumphs of Caesar paintings, and various exhibitions about Henry VIII.

Art deco headquarters of University of London featured in the film Nineteen Eighty-Four.

Magnificent 19th-century bridge, decorated with high towers and featuring a drawbridge. The bridge opens several times each day to permit ships to pass through – timings are dependent on demand, and are not regularly scheduled. When Tower Bridge was built, the area to the west of it was a bustling port – necessitating a bridge that could permit tall boats to pass. Now the South Bank area sits to its west, and the regenerated Butler's Wharf area of shops and riverside restaurants lie to its east. You can get the lift to the top level of the bridge and admire the view. Glass floors provide an interesting perspective for the brave. The museum highlights the bridge's history and engineering, and there are photographic exhibitions along the walkways between the towers.

Designed by Sir Christopher Wren, this tall column (which can be ascended to get a great view) marks the alleged site where the Great Fire of London broke out in September 1666.