The Radar: Beautiful Urban Parks, iPhone Postcard Apps, Secret Vietnam

• Escape from the hustle and bustle of the city with a trip to one of these beautiful urban parks. A few hours in these green oases– like New York’s Central Park, the Butchart Gardens in British Columbia, and Barcelona’s Parc Güell– and you’ll feel miles away from the clamor of the city. [Environmental Graffiti via Neatorama]

• Postcards are getting a 21st Century upgrade. These five iPhone photo apps let users send their cell phone snaps to friends in the form of a digital postcard. No stamp required. [Mashable]

• Discover five lesser-known spots in Vietnam where you can escape the tourist crowds and immerse yourself in local culture. [IBTimes]

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Photo: Michael Colwell/My Shot