Where in the World? Halong Bay, Vietnam

Photo copyright Marc Weinberg

A few days ago, we challenged readers to identify where photographer Marc Weinberg was when he took this photo.

And the answer is Halong Bay, Vietnam

Readers who got it spot on: Sara Hayden, Deane Bell, and Janet Schnall 

There were quite a few guesses for Guilin, China, which apparently has similar scenery.

A lot of people placed it in Asia -- Pippi Islands in Thailand, Yang-Tse River in China,  Li River in China, Andaman Sea, the islands in the bay off of Phangnga, Thailand.