The Great Barrier Reef is as impressive a natural wonder as its name suggests, a wonderland of marine life stretching almost 1400 miles along the northeast coast of Australia. When I planned my trip to Australia in 2012, this was one of the sights I was determined to visit, and it was as beautiful as I had hoped. I used Cairns as my departure point for a full-day snorkeling and snuba tour of the reef. The guides were helpful to point out starfish and giant clams, as well as a shy octopus blending in with a nearby rock. Hidden amongst the anemone were colorful clownfish, while silver schools of mackerel swam above. Our tour also saw reef sharks and stingrays, although we kept a safe distance. I was particularly impressed with the coral, which was brightly colored and magnificent to behold; I'm glad I saw it in 2012 before the recent bout of coral bleaching struck in 2016. The warming ocean temperatures off the coast of Australia are a valid concern, and I'd hate to see long-lasting impact on the unique biodiversity of the reef. Australia is full of wonders on land and sea, and I found the Great Barrier Reef to be an unforgettable marine adventure.

Logistics: The Great Barrier Reef stretches from the Torres Strait to Fraser Island. Tours of the reef can be arranged in cities and towns like Cairns, Townsville, or Port Douglas.