A Sunday wander through the Barbican Conservatory, the concrete-and-glass jungle built around a theatre fly tower in the City of London.

A lunchtime look down from the gallery of The Counting House, the Cornhill pub under the glass dome of a Victorian banking hall.

My photos of London staircases, from palace and hotel grand stairs to Georgian mahogany, iron spirals and Art Deco foyers, with how to see each one.

A winter walk through the Temple's cobbled lanes and Fountain Court ends inside 2 Temple Place, William Waldorf Astor's carved and gilded estate office on the Embankment.

Giant trainers, a winged Dark Angel, a sweet shop dressed as London and a boxer's blue plaque. A walk up Camden High Street from the station to Camden Lock, and why the shops look like this.

The Neasden Temple was carved from 26,300 pieces of stone in India and assembled in north-west London. What to look for, the rules for visitors, and how to get there.

Somerset House went from a Tudor palace to government offices to an arts centre. Its history, and how the building pays its way in the 2020s.

A 45-minute Sunday walk from the Sun in Splendour to Westbourne Park Road, with the history behind Notting Hill's painted stucco terraces.

Dark wool and horsehair climb the front of 16 Hanover Square and fill the rooms inside. Why Nicola Turner built it this way: a chemistry college, a couture house and a hidden poem.

A walk through Maison Assouline, the luxury publisher's bookshop and cocktail bar inside a small bank that Edwin Lutyens designed next to Wren's St James's Church.

A walk through the Courtauld Gallery's Great Room, spiral staircase and Blavatnik Fine Rooms, with the history of Samuel Courtauld and the Royal Academy at Somerset House.

A painted ceiling, a rainbow arch, a library under the beams and the old clock winding room, in a private flat at the top of St Pancras.

Eight-metre palms, brass chandeliers and Gothic windows in St Pancras station's old Victorian ticket hall.

A house built in 1902–1908 to feel like a Greek home on Delos: marble, mosaics, a library like a monk's cell, and the perfect opposite of the Villa Ephrussi up the hill.

The Hermès Bond Street Maison fills the six Georgian houses that were Asprey for 160 years: a Victorian lift, a spiral stair, a botanical room painted by a Brighton illustrator, and what it took seventeen years to build.

A Roman forum, a poultry market, Horace Jones's 1881 ironwork and a monthly vintage flea market, all on one set of cobbles in the City of London.

Old Masters, Sevres porcelain, and the armoury that sent Henry Moore off on a lifetime of shapes inside shapes. A nineteenth century house behind Oxford Street, free to walk into and almost always empty.

The King's Library tower, Magna Carta and the Lindisfarne Gospels in a gallery that costs nothing, and the most welcoming place to sit down in central London.

No ticket needed. A Victorian glasshouse, a fifth-floor terrace over Covent Garden piazza, and the cheapest ways in if you do want to see something on the stage.

Two hundred and ten carved pillars, no structural steel, and golden Jaisalmer limestone hand-carved in Gujarat and shipped to Ealing Road. Free to visit, and open to everyone.