A view of Tsim Sha Tsui West in Hong Kong. The photo is part of a series on Hong Kong cityscapes 'Vertical Horizon' by Romain Jacquet-Lagreze. (Photo: Romain Jacquet-Lagreze)

With 1,248 skyscrapers above 100m (328 feet) in height, the most among any country in the world, Hong Kong is the world's most vertical city. In a series titled "Vertical Horizon," French graphic artist and photographer Romain Jacquet-Lagrèze captures Hong Kong's "architectural race to the sky" with breathtaking images of the metropolis, all shot with a unique (sometimes, vertigo-inducing) perspective—from the ground, looking up to the sky.

"I have always been fascinated by geometric shapes," Jacquet-Lagrèze told Weather.com. "Since I arrived in Hong Kong three years ago, I have been deeply interested in the way the buildings surrounding us can look so abstract."

A densely populated city with one of the world's most impressive skylines and more than 6,500 high-rise buildings, choosing a location and a soaring photographic subject in Hong Kong can be a daunting task, especially for a newly arrived expat. Jacquet-Lagrèze found, however, that being new to the city was actually helpful.

"Being a newcomer in Hong Kong, I was very keen on discovering new places and [new] aspects of this city," he said. "I went through a thorough exploration of the different districts in order to find the most impressive spots."

With the images focusing on a vertical view, using a camera pointing to the sky, it's no surprise that weather is a big consideration in Jacquet-Lagrèze's photography.

"The weather [has] a major role in the creative process," Jacquet-Lagrèze explained. "I prefer to have a blue sky with some clouds in order to add more contrast and details to the photo." Good timing was also essential. "During the middle of the day when the sun is bright and strong, it is almost impossible to see both the sky and the buildings on the same picture," he said. "In order to capture this, I needed to shoot mainly in the early morning between 7 to 9 a.m. or after 5 p.m. when the light gets softer."

Vertical Horizon by Romain Jacquet-Lagrèze is published by Asia One.

MORE ON WEATHER.COM: Photographer Captures Clouds Like You've Never Seen Before

Canadian photographer Matt Molloy creates a stunning time-lapse image by stacking several photos taken of the sky in Ontario, Canada. (Matt Molloy)