In Jegi-dong, the herb market where Seoul still buys medicine by the root

You smell it before you read any sign. Come up from Exit 2 at Jegi-dong (제기동) on Subway Line 1 and the air thickens — bark, licorice, dried citrus peel, something between a forest floor and an opened spice drawer — carried out of a hundred shopfronts before you have seen a single one.

Under the gate

A tall traditional arch spans the street, its beam painted with four characters: 서울약령시, Seoul Yangnyeongsi. Pass beneath it and you are in what the district calls the largest oriental-medicine market in the country, several hundred shops selling hanyak (한약, Korean herbal medicine) packed into a few blocks off Wangsan-ro. The trade here is not a revival staged for visitors. Licensed clinics fill the upper floors, wholesalers load sacks onto handcarts at the curb, and the pharmacists behind the counters are usually the second or third of their family to stand there.

The roots run deep in more than one sense. Bojewon (보제원), a Joseon-era relief station that fed and treated the poor, once stood in this quarter, and the medicine business never really left. Today the streets carry names like Yaknyeong-jungang-ro, the herb-market central road, and the signage reads as a plain census of what Korea takes when it feels unwell.

Reading a herb shop

Step inside any one of them and the layout repeats. Glass jars and hemp sacks hold dried jujube (대추, daechu), goji berries (구기자, gugija), astragalus root (황기, hwanggi), and the pale forked bodies of ginseng (인삼, insam). A brass or digital scale sits at the counter; you point, the owner weighs, and the order goes into a square of brown paper folded with two practiced creases. A bag of dried jujube runs somewhere around 10,000 won, a small measure of good ginseng many times that.

Buy loose and you take home tea. A handful of daechu and a few slices of hwanggi, simmered for an hour, make the amber drink Koreans reach for in a cold snap. Buy a full prescription and you enter another system entirely: a clinic upstairs writes the formula, the shop decocts it, and you leave with a box of foil pouches, one to drink morning and night. Say cha (차, tea) if you only want something to steep; say yak (약, medicine) and expect questions about what ails you.

The scale is the whole transaction. Nothing here is priced by the package; it is priced by the gram, weighed while you watch.

The museum and the free foot bath

Halfway down the main lane is the Seoul Yangnyeongsi Herb Medicine Museum (서울약령시 한의약박물관), and it is free. Two floors lay out the tools of the trade — pill-rolling boards, herb cutters, a reconstructed old pharmacy — with enough English to follow. It keeps daytime hours, roughly 10:00 to 17:30, and closes on Mondays.

The reason to climb the stairs, though, is off to the side. On many afternoons the museum runs a warm herbal foot bath (족욕, jokyok), free to anyone who rolls up their trouser cuffs. You sit along a low wooden trough of steaming, tea-coloured water while the market rushes past outside. It is the rare thing in Seoul that costs nothing and asks nothing in return.

Where it spills into Gyeongdong Market

The herb lanes bleed, without any clear border, into Gyeongdong Market (경동시장), one of the city's great sprawling markets. Here the dried roots give way to mounds of fresh ginseng, red chilli, mushrooms, mountain greens and honey, sold by grandmothers who have held the same spot for decades. Autumn is the market's loudest season: the year's harvest of jujube and ginseng arrives, and the alleys turn over to the smell of new roots.

가을이 되면 햇약재가 들어와, 골목 전체가 마른 뿌리 냄새로 바뀐다.

Eat where the traders eat. A paper cup of ssanghwa-tang (쌍화탕), the dark spiced tonic sold from the herb-tea stalls, costs a couple of thousand won and warms you from the sternum out. For something heavier, the market's back kitchens ladle out samgyetang (삼계탕), a whole young chicken stuffed with rice and ginseng in clear broth — the logical lunch in a place that sells the ginseng.

Getting there, and when

Take Subway Line 1 to Jegi-dong Station (제기동역) and leave by Exit 2; the market gate is a two-minute walk and there is no way to miss it. Come in autumn if you can, when the new stock is in and the air is at its most pungent, but mind the calendar: many stalls close on the first and third Sunday of the month, and the museum shuts on Mondays, so an off-schedule visit earns you a lane of steel shutters. Bring cash, since the smallest stalls still prefer it. The one mistake to avoid is treating the counter like a supermarket — do not buy a potent medicinal formula off a shelf on a whim. Ask for tea-grade herbs, or let a clinic prescribe, and the market gives you exactly what you came for: the oldest smell in Seoul, weighed out by the gram.