(CNN) — What did you do on your last plane journey? Fall asleep, watch a movie, draft some emails?
Not architect John Gardner. A frequent business traveler, he's found a way to turn these journeys into an artistic outlet.
The Bermuda-based executive passes time on planes by sketching the sights and scenes he spies on board.
"Sketching is a nice alternative to taking pictures, as it is making something by hand -- and encourages really seeing and remembering and interpreting," Gardner tells CNN Travel.
Cabin creative
John Gardner sketches scenes from his airplane seat.
Courtesy John Gardner
Gardner -- who trained at the Rhode Island School of Design (RISD) -- has a busy schedule that'll sound familiar to many business travelers.
"Right now, I'm teaching advanced architecture at the Rhode Island School of Design, and I'm going up every weekend to Boston from Bermuda," the 58-year-old explains.
"I'm doing two flights and two drawings a week," he says. "I'm in an intense phase right now, which is kind of fun."
Gardner's on-board artistic endeavors overlap with his day job, but they also allow the architect to experiment with a different medium.
"In my architectural job I'm imagining things, usually they're buildings and spaces," says Gardner. "In this instance I'm drawing what I see."
Gardner captures both intricate details and abstract scenes.
Courtesy John Gardner
What Gardner sees includes profiles of other passengers, antics of the air stewards, stained coffee cups and crumbling pretzels, intricate detail of curtains and time spent in the terminal.
The results are eye-catching sketches, popping with color from his paints that capture life through the business traveler lens. Sometimes the sketches are abstract, evoking a general sense of the on-board experience with overlapping snapshots of air stewards' uniforms, laptops and fellow passengers.
Other times they're more detailed studies of intricate airline scenes.
"It's a creative release," Gardner says. "I find the time on the plane is really very valuable because there's nothing else taking me away from where I am."
Drawing inspiration
Gardner is particularly interested in the antics of the air stewards.
Courtesy John Gardner
It's become a creative challenge for Gardner to search out prospects he's yet to paint.
"It is hard sketching and painting what is essentially the same view," he says. "But the style can change and if I look hard enough or relax and just start drawing, interesting things reveal themselves."
He particularly enjoys sketching flight attendants.
Gardner will ask his neighboring passengers if they mind being sketched.
Courtesy John Gardner
"They're hard to draw as they're constantly moving," he explains. "So what I'll actually do is I'll take a few pictures on my iPhone and I'll sketch them loosely and then I'll tighten it up."
Gardner is full of praise for cabin crew.
"The flight attendants are amazing," he says. "I've never had a bad experience. They get really interested in what I'm doing, so sometimes I give them my sketchbook and they go take it to the galley and take photos. Some of the sketches have their names on them."
Fine art
Gardner says the humidity on board the plane is perfect for watercolor.
Courtesy John Gardner
Surprisingly, Gardner says airplane conditions lend themselves perfectly to a spot of painting.
"The majority of my sketches are are pen and ink and watercolor," he says. "The best thing about watercolor in planes is the humidity is very low, so you can paint and it dries very quickly, which is really nice."
Gardner will sketch in every situation -- aside from take off and landing -- whatever cabin he ends up in.
Gardner, pictured here painting on board a plane, tries his best to sketch in all conditions.
Courtesy John Gardner
"What I'll do is ask for two waters and a coffee -- I'll drink one water -- the other's for the paint," he says. "I try really hard not to have an accident when it's a tight space!"
Naturally, it's always easier if he flies executive -- but in economy, aisle seats work best.
"It is virtually impossible to paint in the middle seat with two passengers on either side," says Gardner. "Everything gets set out on top of the sketchbook and they get nervous the water will spill on them!"
However Gardner's fellow travelers are mostly unperturbed by his creative efforts -- even when they're the subject of his artistic eye.
"Passengers don't usually know I am drawing them and I ask if they are next to me," he says. "They'll always say, 'yeah that's great.'"
Gardner will sketch subjects in the airport terminals, as well as on board.
Courtesy John Gardner
In the terminal, Gardner will sketch faces from far away.
He's also become interested in the limited on-board lighting.
He lists inspirations as, "the light from the windows, the pattern of the chairs, the red lights, the ubiquitous 'exit' signs, the food in front of you, the industrial engineering, the grays and blues."
Worldwide feedback
Gardner has recently set up an Instagram account to share his sketches.
Courtesy John Gardner
As every frequent flier knows, time on the plane can be draining and feel unfulfilling.
For Gardner, his sketches allows him to appreciate the everyday -- and find satisfaction in the mundane.
"It makes the memory of the flight particularly interesting," he says. "More interesting than if I just got on and got off.
"I find at the end of the flight, I look at the sketch and it's revealed something about the environment I was in," says Gardner. "Something I wasn't looking for, but it happened."
Gardner's students at RISD inspired him to share his work.
Courtesy John Gardner
Gardner has been sketching intensively for the past five years -- and he's kept a sketchbook since his student days at RISD -- but it's only recently that he's started sharing his work with a wider audience.
"I've been very private about my artwork, because I've really been an architect," he says.
"In the last few years I've just been exploring a bit more energy on my artwork, with the view of being a more serious artist."
It was Gardner's undergraduates at RISD who encouraged him to share his sketches on social media.
"I was prompted by the younger generation," he says. "And I was comfortable enough on my own terms that [my drawings] were ready to be out there."
It's early days, Gardner's already inspired and excited by the virtual feedback.
"The response is this huge, worldwide array of people who pick up your work," he says. "I think that's just fascinating, and then I see what they're interested in and it's this whole portal to having a broader perspective around the world of what's going on."
Appreciating the everyday
Gardner finds painting on planes a rewarding and fun experience.
Courtesy John Gardner
Gardner also encourages others to follow in his footsteps -- to find new ways to appreciate their commute and everyday routine, whether through sketching or other mediums.
The trick he says, is commitment and patience.
"The key is really to have a sketchbook and carry it with you everywhere," Gardner advises. "When you get a spare moment, whether it's on the plane or in a café or waiting at the airport, just start doodling and drawing [...] you'll be amazed at where you'll end up in one, two or five years."
For Gardner it's been a revolutionary experience.
"Drawing and painting in the air is a wonderful and rewarding exercise," he says. "I think sketching and drawing and painting is a means to understand, appreciate and remember things better, even if it's sitting in a seat in a plane."