The incredible city that's the world's narrowest - just 30 metres wide

An incredible city that's the world's narrowest is just 30 metres wide and sits across a river.

Yanjin County is in the northeast of the Yunnan Province in China. It sits on the banks of the Heng River in a valley between two mountains.

The city is the narrowest in the world and has piqued the interest of globetrotters who are absolutely fascinated by its proportions.

At its narrowest, the city is 30 meters wide, and the widest part is 300 meters. Most parts are on the riverbank, though not many bridges have been built.

The buildings are thin and situated on tall pillars, due to land being very and as a preemptive measure toward water-level rise during periods of heavy flooding.

Despite being constrained by the area's geography, locals have turned this former mountain trading hub into a bustling metropolis of 400,000 people.

With just two streets running along each bank of the river, the city is hoping to capitalise on its newfound popularity and attract more and more tourists.

Videos of the city often get global attention on social media because of its uniqueness and the surrounding natural environment.

YouTube content creator @MegaProjects-su9sp posted a video, saying: "Every house is closely connected with almost no vacant space.

"Moreover, you don't have to worry about getting lost because the entire place has only one main road. It is truly a single-road city. The unique geographical environment gives Yanjin a distinctive charm, filling people with curiosity and a desire to explore."

Despite being constrained by the area's stunning geography the city is now a bustling metropolis of 450,000 people.

Due to its remote location getting to Yanjin County isn't an easy feat. However, the Chongqing-Kunming highway runs through the valley and right by the city making arrival by road relatively convenient.

There are also a number of ways you can get to Yanjin using public transport - including catching a high-speed bullet train to Kunming, the provincial capital.