Vacation Alert

Before booking your dream vacation online watch this to avoid a vacation disappointment.
2:07 | 08/20/14

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Transcript for Vacation Alert
And next tonight, your dream vacation, the hotel you loved and booked online? Well, are you in for a surprise? Here's ABC's Paula Faris. Reporter: You've been searching online for that perfect hotel. The beautiful rooftop pool or the stunning view of the Athens ruins and the beach fit for a romantic stroll. But what you didn't see on the website -- that perfect rooftop pool? Well, check out this photo of that same pool. Didn't catch that Macy's the first time. And those incredible Greek ruins? Look at this picture taken from the hotel entrance, not so close from down here. And on your beach stroll, try walking around all those chairs. Oyster, the self-proclaimed hotel tell-all website, calls this "The fakeout." Sometimes fake, sometimes real, just artfully presented. Hotel marketing can be extremely misleading. Reporter: We teamed up with oyster and visited the grand beach resort. Only problem? The beach -- not so grand. There's the water and here's the wall. Reporter: The hotel admitted later that their grand beach was swept away by hurricanes ten years ago. And what about those pools? These are the photos from an upscale New York hotel website. You know what I'm really enjoying? The view. Pool photos in particular are often cropped very artfully. Reporter: Check out these shots at other hotel websites. It's not the full picture. And one of the methods is to take the photo from here, inside the pool. Looks like it stretches on forever. Reporter: So, how do you tell fact from, well, less appealing facts? Do your homework before you book. Online resources like oyster and tripadvisor have their own photos to give you a reality check. If you really know what to expect, you're going to be a happier guest. Reporter: Paula Faris, ABC news, New York.

This transcript has been automatically generated and may not be 100% accurate.

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