Looking for souvenirs? Hand-painted Byzantine icons will appeal to your artistic friends, while foodies will enjoy tucking into pastel-tinted sugared almonds (a must for Greek weddings and christenings), designer olive oil, locally made organic honey or a bottle of ouzo (the licorice-flavored liquor that's a Greek treasure).
In Greece, a sales tax (VAT) is tacked onto almost every purchase; however, if you spend enough money at participating stores, you can often get the VAT refunded (with some exceptions). Be sure to ask when you make your purchase, and retain all of your receipts.
Check out Ermou Street (off of Syntagma Square), a car-free outdoor walkway lined with Greek and European shops, including plenty of international name brands.
Not far from Ermou Street and Syntagma Square is Attica, Greece's homegrown (and very fashionable) department store. Treat yourself to lunch with a view at the top-floor cafe.
Plaka is home to plenty of tacky tourist shops, but you'll also find stores selling jewelry, antiques and clothing.
Simply wandering the narrow streets of Kolonaki will yield bountiful finds, with numerous galleries, clothing boutiques and jewelry stores to entice visitors.
Where to Stay in Greece: Lodging
Getting Around Greece
Athens Travel Guide
Slideshow: Greek Isles Revealed
25 Ways to Save in Europe
Plan a Europe Trip in 10 Steps