Walk Kolkata and fill the map fast

FOG hides the whole world map under fog and clears it only where you have physically walked. Kolkata is one of the better cities to do this in, because so much of it is genuinely walkable.

The ground is flat and the streets are old

Kolkata sits on the flat delta of the Hooghly, barely above sea level, with no hills at all. Nothing about the terrain will slow you down. What shapes the walking is the street pattern, and Kolkata has three distinct ones layered on top of each other.

There is the colonial layout of the centre: wide roads and formal squares around BBD Bagh (Dalhousie Square), with the vast open Maidan south of it, an enormous green rectangle between Fort William and Chowringhee. There is the older north, around Shobhabazar, Kumartuli and Bagbazar, a fine mesh of narrow lanes and galis with courtyard houses, where the blocks are tiny and every turn opens another route. And there is the newer south and east, Ballygunge, Jodhpur Park, Salt Lake, laid out in blocks and roundabouts with more space and more traffic.

Most of the centre and north has continuous pavement, which is not something every Indian city can claim. People walk here in large numbers, so the infrastructure exists.

A route worth an afternoon

Start at Prinsep Ghat on the river, south of the centre, and walk north along Strand Road with the Hooghly on your left. Pass under the Howrah Bridge approach, then turn inland into BBD Bagh and circle the tank. From there head north on Rabindra Sarani into the old northern lanes, working toward Kumartuli where the clay idols are made. Come back south through the College Street book market, then along the edge of the Maidan past the Victoria Memorial.

That is a long day, entirely flat, and it stitches together the river, the colonial core, the dense north and the green centre in one continuous line. If you want something shorter, an hour spent purely in the north Kolkata lanes will clear more area than an hour anywhere else in the city.

Walking the Howrah Bridge itself is worth doing. It has a pedestrian walkway, it is loud and crowded, and it draws the only line across the river you will get on foot.

Why the fog burns off quickly here

Kolkata rewards this app more than most large cities. The density of walkable lanes in the north and central areas means the cleared area grows in solid patches rather than threads, and because the city is flat you can keep going for hours without the terrain deciding for you. A determined week could put a real dent in the core.

The Maidan is the odd one out. It is a huge open space crossed by a limited number of paths and roads, so it stays mostly grey even after you have walked around it several times. Crossing it in different directions is the only fix, and it is a pleasant enough problem to have.

Salt Lake and New Town in the east are the modern counterweight: wide roads, big blocks, long distances between anything. They eat time and give back little map. Most people find their coverage concentrates heavily west of the EM Bypass.

Heat, monsoon and the walking season

Season. The good months are November through February, when it is dry and mild and walking all day is comfortable. March onward gets hot, and the pre-monsoon humidity in May is punishing. The monsoon from June to September brings serious rain and street flooding in low-lying areas.

Time of day. Early morning is the best walking in the city by a wide margin. The streets are quieter, the light is good, and the temperature is survivable.

Traffic. Crossing the big roads takes patience. The lanes are calm by comparison, which is another reason the north fills in so pleasantly.

FOG keeps revealing with the app closed and the screen off, so you can walk with the phone in your pocket. There is no account, no cloud, no analytics, no ads, and the map never leaves your device.

Questions people actually ask

Start with a dark map.

FOG is free to explore. No account, no subscription, and your map never leaves your phone.

free to explore · one purchase unlocks everything · never a subscription