With about 150 million active users, the mobile photo-sharing app Instagram has become a popular way for people to document their lives.
It lends itself particularly well to travel, when even the most reluctant photographer can be tempted to take a few pictures.
The most Instagrammed places in the world last year included an airport, amusement parks and a Las Vegas casino.
CNN journalist and avid Instagram user Jethro Mullen has racked up nearly 800,000 followers on Instagram.
Here are his tips for getting the best out of your phone camera when you travel.
1. Get high
Everything looks better, or at least different, when seen from above.
Viewing platforms, sky bars, cable car rides and overhead walkways are great for expansive perspectives.
If you're shooting through a window, get your lens as close to the glass as possible to reduce unwanted light reflections.
2. Learn from locals
Nobody knows a place better than the people who live there.
You can discover photogenic spots in the places you're going to visit through hashtags, geotags and the feeds of local Instagram users.
When I visited Atlanta last year, a photographer I knew through Instagram pointed me in the direction of the colorful staircase you can see in photo no. 2 above.
3. Be on the look out when you're on the move
Don't tune out while in transit.
Architecture and human activity at airports and rail stations often provide rich photo opportunities.
And the views from planes, trains and automobiles can be compelling.
Window seats offer great shots.
Flights from southern China to Europe can provide majestic views of mountains on the edge of the Tibetan Plateau, for example.
4. Get lost