Editor's note: A previous version of this article was published in July 2012. We've added a few items and updated the list. We'd love to hear about your own "incredible sights" in the comments too.
Temples that tower out of mist-cloaked jungles; a herd of wildebeest, one million-strong, trekking across the African plains; a midnight sky filled with stars.
There are some things around the world that provide photo-showing rights for decades.
We haven't got them all -- in fact we barely scratched the surface.
But we have picked out a few of the scenes that, if you're lucky enough to witness them, will invariably leave you spellbound.
Let us know what other beautiful sights you've witnessed on your travels in the comments
1. Sossusvlei Dunes, Namibia
Sossusvlei means "the gathering place of water" but you'll need to bring your own if you don't want to dehydrate at this, Namibia's most outstanding attraction.
The dunes have developed over millions of years, the result of material flowing from the Orange River into the Atlantic, carried north and returned again to land by the surf.
Climbing the dunes yields breathtaking views, including the Deadvlei, a ghostly expanse of dried white clay punctuated by skeletons of ancient camelthorn trees.
More info at www.namibian.org
2. Torres del Paine, Chile
In the heart of Patagonia, glaciers rise in the midst of mountainscapes and alpine meadows, close enough to hike right up to and touch. They make Torres del Paine one of the most special national parks in the world --- you'll never forget your first sight of ice on the beach.
Explora offers a four-night package including transfers from Punta Arenas, full board and excursions from $2,780; lastfrontiers.com
3. The great migration, East Africa
No sight in the world replicates the timeless drama of tens of thousands of wild beasts charging across the African plains in search of food and water while pursued by their predators.
The best way to experience the migration is via a mobile camp which ups sticks and follows the animals every day.
A four-night safari combining two nights in Singita's Explore mobile camp and two in a fixed location in the Serengeti costs from $5,110, including internal flights, full board and safari activities; aardvarksafaris.co
4. Star-filled sky, Mackenzie Basin, New Zealand
Picking out Orion's Belt and The Big Dipper is even more impressive if there are a million other stars distracting you from the task.
A 1,600-square-mile area in New Zealand's South Island comprising Aoraki/Mount Cook National Park and the Mackenzie Basin has just been designated the world's fourth International Dark Sky Reserve, making it "one of the best stargazing sites on Earth" according to Bob Parks, executive director of the International Dark-Sky Association.
Nature's Highway arranges three-night/four-day cycling tours to Mackenzie Basin from $995 per person. Includes accommodation, bike hire and luggage transport; natureshighway.co.nz/tour-dates-and-price
5. Cormorant fishing, China
With its mountain backdrop and shores lined with ancient houses, the Nanxi River in Zhejiang inevitably became the cradle of classic Chinese water-and-ink painting.
By drifting down the Nanxi River on a bamboo craft, travelers can enjoy views of locals doing laundry along the river and fishermen employing traditional methods of using cormorants to catch fish. The xiangyu is a rare freshwater fish unique to the Nanxi.