The Radar: Tower Views, Dealing with Street Vendors, Best Time to Visit the National Parks

• Take in the city scenes from the top of one of these world towers with a view. Don’t forget your camera! [BootsnAll]

• Don’t become easy prey for aggressive street vendors. Use these tips to navigate your way through bazaars and markets without looking like too much of a tourist. [Frommer’s]

• October may be the best time to visit U.S. and Canada’s national parks. Fewer crowds, better temperatures, and colorful foliage are among the perks of this time of year. [Lonely Planet]

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Photo: Rick Takagi/ My Shot