Royal Geographical Society

This garden square was established by Lord Southampton in 1665 and is the oldest square in London. It was opened to the public in the 1950s. The square is surrounded by a number of beautiful 18th- and 19th-century buildings and terraces.

Created by Tonkin Zulaikha Greer and Janet Laurence to remember the Australians who died in both world wars. Made from Australian granite.

Medieval Grade I listed church. This church played a key role in the English Revolution and was the parish church of some of the most decisive Puritans: Oliver Cromwell was married and this is where John Milton was buried. It was the home of the Morning Exercises. The tower remains from the original building; the rest was destroyed in the Blitz but rebuilt based on the original plans.

A retirement home for soldiers created by King Charles II. Tours around the listed building and grounds are regular and include the museum (which can be visited separately) whose exhibits contain military memorabilia donated by Chelsea Pensioners over the years.

The former home of Sigmund Freud. A wide range of exhibits, most famously including the psycho-analytic couch that all of his patients used. Freud was an avid collector of antiquities and there is a fine collection of Greek, Roman and Oriental pieces on show.

Garden founded by apothecaries in the 17th century to the medicinal properties of plants. It was only opened to the public in the 1980s, when it became a charity. The heat-sink caused by its thick walls, combined with the general waste heat of London itself, keeps the garden much warmer than it would otherwise be at this latitude. Due to this, the garden contains the world's most northerly example of a grapefruit outside of a greenhouse, and the largest fruiting olive tree in the country. The collection contains thousands of different plant species.

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.

The Serpentine is a long, thin artificial lake within Hyde Park which contains a range of waterfowl and fish. It was first made by damming the River Westbourne but it is now fed by three boreholes. The western end of the lake is actually in Kensington Gardens, in which it is called The Long Water. Swimming and boating are popular activities on the Serpentine; see 'Do' section.

A stone howitzer by World War I veteran Charles Sargeant Jagger

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.

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 oldest of the Royal Parks of London.

London's main zoo is in the northern reaches of Regent's Park. Takes a very conservation-driven approach these days and always has great exhibits aimed at children. Opened in 1828 for scientific study, then to the public in 1847.

Su Catholic Church of England with bells and smells (incense). There is an impressive model of the old London Bridge.