Harry Potter and the Philosopher's Stone
'Could there really be a piles of wizard gold buried miles beneath them? Were there really shops that sold spell books and broomsticks?'
The Leaky Cauldron
According to Hagrid, a famous place. In Harry's eyes a 'tiny, grubby-looking pub,' with a 'dark and shabby' interior. Apart from the customers and a brief mention of the barman, there is no other real description of the pub itself. On leaving the pub to enter Diagon Alley, Hagrid and Harry head 'through the bar and out into a small, walled courtyard, where there was nothing but a dustbin and a few weeds.' After tapping the correct bricks on the wall ('three up... two across'), one of the courtyard walls rearranges itself into a archway leading onto a cobbled street.
Unnamed Cauldron Shop
Likely to be Potage's Cauldron Shop, this is the first place that Harry sees when entering the Alley. A sign outside reads 'Cauldrons - All Sizes - Copper, Brass, Pewter, Silver - Self-Stirring - Collapsible.'
Harry purchases a pewter cauldron, after being told he cannot purchase a gold one.
Unnamed Apothecary (Apothecaries?)
Unnamed shop, evidently overcharging customers as one is heard criticising their pricing of Dragon Liver.
A second reference is made to an apothecary, 'windows stacked with barrels of bat spleens and eel's eyes.' Another comments mentions potion bottles.
'They visited the apothecary's, which was fascinating enough to make up for its horrible smell, a mixture of bad eggs and rotted cabbages. Barrels of slimy stuff stood on the floor, jars of herbs, dried roots and bright powders lined the walls, bundles of feathers, strings of fangs and snarled claws hung from the ceiling. While Hagrid asked the man behind the counter for a supply of some basic potion ingredients for Harry. Harry himself examined silver unicorn horns at twenty-one Galleons each and minuscule, glittery black beetle eyes (five Knuts a scoop).'
Eeylops Owl Emporium
A dark shop, with sounds of low, soft hooting coming from inside. A sign above states 'Eeylops Owl Emporium - Tawny, Screech, Barn, Brown and Snowy.'
'Twenty minutes later, they left Eeylops Owl Emporium, which had been dark and full of rustling and flickering, jewel-bright eyes.'
Unnamed Quidditch Shop
Likely to be Quality Quidditch Supplies. Several children are seen with their noses pressed against the window staring the newly-released Nimbus Two-Thousand.
Madam Malkin's Robes for All Occasions
A shop selling robes, owned by Madam Malkin - a squat, smiling witch dressed in mauve. This is also where Harry first encounters Draco Malfoy.
Unnamed Supplies Shop(s?)
References are made firstly to shops selling telescopes and strange silver instruments, and later to globes of the moon.
Harry purchases some scales for weighing potions ingredients, and a collapsible brass telescope from a shop like this.
Unnamed Stationery Shop
References are made to a window display quills and rolls of parchment.
Harry later purchases parchment, quills and colour-changing ink.
'They had reached a snowy-white building which towered over the other little shops. Standing beside its burnished bronze doors, wearing a uniform of scarlet and gold, was -' [a goblin].' They then walk up white stone steps, entering the first lobby, before reaching a second set of doors, this time in silver, with the following words:
Enter, stranger, but take heed of what awaits the sin of greed, for those who take, but do not earn, must pay most dearly in their turn, so if you seek beneath out floors, a treasure that was never yours, thief, you have been warned, beware of finding more than treasure there.'
After passing through these doors, they enter a vast marble hall; with around a hundred goblins working - some behind a long counter, sitting on high stools. The goblins are writing in large ledgers, weighing coins and examining objects through magnifying glasses.
After confirming identity, they are led to a door off of the hall. No marble here. A narrow stone passageway lit by flaming torches sloped steeply downwards. A little rail cart carried them to the vaults through a maze of twisting passages. Stalagmites and stalactite grew from the floor and ceiling.
Flourish & Blotts
A reference is made to a window display of 'tottering piles of spellbooks.'
Harry's schoolbooks were purchased here, 'the shelves were packed to the ceiling with books as large as paving stones bound in leather; books the size of postage stamps in covers of silk; books full of peculiar symbols and a few books with nothing in them at all.'
'The last shop was narrow and shabby. Peeling gold letters over the door read Ollivanders: Makers of Fine Wands since 382 B.C. A single wand lay on a faded purple cushion in the dusty window. A tinkling bell rang somewhere in the depths of the shop as they stepped inside. It was a tiny place, empty except for a single spindly chair... [Harry] looked instead at the thousands of narrow boxes piled neatly right up to ceiling.'