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1. Avenue of the Baobabs
The striking Grandidier's Baobab trees that line the road are endemic to Madagascar and almost 3000 years old.
2. Necropolis of Saqqara
The cemetery of ancient Memphis, where archaeological treasures are still being discovered.
3. Ben Nevis
The United Kingdom's tallest mountain, located in Scotland and climbed over 100,000 times a year.
4. Mefou National Park and Primate Sanctuary
A sanctuary for primates native to Africa.
5. The Richat Structure, or "Eye of the Sahara"
A prominent and visually striking eroded geological dome also known as "Earth's Bullseye".
6. Maya Biosphere Reserve
This reserve protects the largest area of American tropical forest remaining north of the Amazon.
7. The Fabedougou Domes
Dome-shaped limestone formations sculpted over millennia by water and erosion.
8. Geba River Estuary
Guinea-Bissau's capital, Bissau, is situated where the estuary opens into the Atlantic Ocean.
9. Bled Island
Surrounded by Lake Bled, and notable for its beautiful church dedicated to the Assumption of Mary.
10. To Sua Ocean Trench
The turquoise water of To Sua - literally "Giant Swimming Hole" - rises and falls with the tides.
11. Victoria Falls
Shared with Zambia, the falls are also known by the name Mosi-oa-Tunya, or "The Smoke that Thunders".
12. Cape Kolka and Lighthouse
Where the Baltic Sea meets the Gulf of Riga.
13. The Gardens of Babur
A historic park in Kabul, it was developed in the 16th Century by the first Mughal emperor Babur.
14. Sri Siva Subramaniya Temple
A colorful Hindu temple - the largest in the Pacific - located in Nadi, Fiji.
15. Franz Liszt Academy of Music
A prestigious academy named for the virtuoso Hungarian pianist and composer.
16. Te Namo Lagoon
Otherwise known as Funafuti Lagoon, large enough for cargo ships to enter and dock.