Fishmongers' Hall

The oldest church in the City, founded by Saxon abbots in 675 AD.

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.

A stone howitzer by World War I veteran Charles Sargeant Jagger

Discover mementoes of the famous fictional detective. In reality, this was a lodging house used in the late 1800s and has three floors. The first floor contains Sherlock Holmes' study with Watson's desk, and has bullet holes spelling the initials VR (for Victoria Regina, Latin for Queen Victoria) much to the chagrin of the landlady Mrs. Hudson. Next to that is Holmes' bedroom with a rogues' gallery containing photographs of several notable Victorian-era murderers including Lizzy Bourdain. The remaining rooms upstairs have waxwork figures and artefacts referencing the novels, as well as their adaptations to stage and screen. Photography allowed, though filming requires permission. Prebooking is recommended to circumvent long queues.

The National Portrait Gallery is just around the corner from the National Gallery and is an entertaining way to learn about British history since the Tudors. Visitors walk around the gallery chronologically, viewing portraits of notable figures from British history - from Henry VII, painted by Hans Holbein, to Blur, painted by Julian Opie.

Prestigious contemporary art gallery worth a visit.

One of the most expensive residential streets on the planet! Most of the buildings here are embassies or ambassadorial residences but the rest of the mansions belong to some of the richest people in the country (or elsewhere). For added historical value, during World War II, the current Norwegian embassy was where King Haakon VII led the Norwegian government-in-exile (commemorated by a blue plaque) and MI19's "London Cage" prisoner-of-war facility was located here. There is no public right of way but the Crown Estate allow pedestrians and cyclists to use the street; photography is not permitted.

Founded by William the Conqueror in 1066, enlarged and modified by successive sovereigns, the Tower is today one of the world's most famous and spectacular fortresses and a UNESCO World Heritage Site. Discover its 900-year history as a royal palace and fortress, prison and place of execution, mint, arsenal, menagerie and jewel house. In the winter you can skate on the dry moat. The Tower contains enough buildings and exhibits to keep a family busy for a full day, with plenty of both warlike and domestic contents. Some areas, such as the St John's Chapel in the White Tower, do not allow photography, but these are clearly signposted. Beefeaters, who are all retired sergeant majors from the British Army, provide guided tours for free as well as ceremonial security. See history come alive – go to the Ceremony of the Keys at the Tower of London. This ceremony, the locking up of the Tower, has been performed every night at 10PM for 800 years. Tickets for the ceremony are £5 and must be prebooked.

The largest open space in London, covering almost 1,000 hectares (2,500 acres) and home to a huge array of wildlife, including 400 wild deer. Also contains the lush Isabella Plantation, which is full of trees and flowers, and the Royal Ballet School, seen in the film Billy Elliot. Popular with cyclists, both for the on-road perimeter circuit and the off-road trails. There are several car parks for walkers and picnickers.

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.

Now permanently closed, will be replaced by new museum at the former Smithfield market site in 2026. The Museum of London Docklands remains open.

The main sights to see in London's Chinatown are the expressions of Chinese culture and Eastern ambience in Chinatown, and for a good Chinese meal. There are few souvenir shops for tourists and no museums or temples. The three ornamental Chinese arches are worth a look. Chinatown does incorporate some entertaining combinations of British and Chinese culture, such as the phone booths with pagoda-style sloping roofs.

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.

On the UNESCO World Heritage List, the Palace of Westminster is the seat of Parliament in the United Kingdom. It's often termed the "Mother of All Parliaments" - an exaggeration, but perhaps only a slight one. The present building largely dates from the 19th century when it was rebuilt following a fire in a splendid example of Victorian neo-Gothic architecture. The House of Commons (elected Members of Parliament or MPs) is located to the north of the building and is decorated with green leather upholstery, and the House of Lords (unelected Lords) is located to the south and decorated with red leather upholstery.