Piccadilly Circus

The main residence of His Majesty King Charles III, Her Royal Highness Queen Camilla, and latterly of HM Queen Elizabeth II. In the summer, 19 State Rooms are open to the public. Places are strictly limited, and it might not be possible to just turn up and get a ticket for a specific entry time, visitors should book in advance to ensure admission.

The Guildhall Art Gallery houses the City Corporation's art collection, and also runs special exhibitions throughout the year. During construction of the modern gallery, workers discovered the ruins of London's Roman amphitheatre. The gallery was redesigned, and now the Amphitheatre is open to the public within the Guildhall Art Gallery itself and also free of charge.

The TfL-backed Hidden London offers tours around the disused Aldwych tube station which had its own branch on the Piccadilly line. The tour explains the station's unusual history including its use for protection (for both people and historical artefacts held by the British Museum) from the Blitz during WWII. More recently, it was used as a filming location and for testing station equipment and decor. Of note, it was used for filming James Bond: Die Another Day, V for Vendetta and the Prodigy music video for Firestarter. Tours are roughly an 1 hour and 15 minutes long, wear sturdy shoes (not sandals).

London Stone is a historic landmark housed in a public display case at 111 Cannon Street in the City of London. It is an irregular block of oolitic limestone measuring 53 × 43 × 30 cm (21″ × 17″ × 12″), the remnant of a once much larger object that had stood for many centuries on the south side of the street.

The headquarters of world's most famous insurance market, housed in a revolutionary (at the time) bizarre, Matrix-like glass-and-steel building designed by Richard Rogers, with all support services (lifts, ventilation, etc.) suspended outside. Recognised as a masterpiece of exoskeleton architecture.

Substantial nature reserve on the old disused Barn Elms Reservoirs. A major wetland habitat for wintering wildfowl and an excellent choice for any keen birders visiting London, and an entertaining place for kids to learn about nature

The unusual "walkie scorchie" profile of this skyscraper by Rafael Vinoly has seen it grab the headlines, as did the "death rays" caused by the sun's heat reflecting off the building onto the street below when it was first completed; car tyres melted and burst, and at least one man fried an egg using only the heat from the walkie talkie. Visitors can access the sky garden to see a magnificent view over the City and beyond; it's the only place you can't see the tower from! Online booking to visit during the day is essential. Alternatively, you can eat at one of the restaurants in the evening.

Islamic Cultural Centre and the main mosque in London. Visitors are welcome but must be suitably attired. The Mosque runs classes, prayers, talks and events.

Worth a quick visit if you are passing. The brick and stone neo-Byzantine Catholic Cathedral (not to be confused with the much more famous Westminster Abbey) is near Victoria Station, just off Victoria Street. Construction started in 1895, and some of the interior is still unfinished. The Treasures of Westminster Cathedral exhibition is inexpensive and worthwhile for learning the history of the cathedral, there are interesting exhibits including a 1:28 wooden scale model uses by the architects. Has a café and gift shop.

One of the oldest churches in Battersea, this church is where Christians have worshiped at the same site since 800 AD. It is protected as a Grade I listed building with its combination of heritage and architectural merit.

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.

The eastern half of the twin parks. Of the two, Hyde Park is open for longer and has more open, unwooded land; it is often host to concerts, fun fairs and events. More of an artificial stream than a fountain, flowing in an oval through an open grassy area which, in normal summers, is a popular paddling spot for children and grown-ups alike.

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.

Designed and built in 1619-1622 by the Neo-Classical architect Inigo Jones, The Banqueting House is now all that remains of Whitehall Palace, the sovereign's principal residence from 1530-1698 when most of it was destroyed by fire. Renowned for its architecture and paintings (by Rubens, among others), the building is also famous for being the scene of Charles I's execution in 1649 at the end of the English Civil War.

Park overlooking the river, with the local war memorial. Be careful at high tide, as it may flood.