Danxia - 27
Erta Ale - 27 + 1 = 28 Yes, more volcanoes.
Great Blue Hole - 11
Guilin Mountains - 24
Iguaçu Falls - 28
Kīlauea - 27
Lake Baikal - 21
Lençóis Maranhenses - 30
Underwater Waterfall - 25
White Desert (Egypt) - 24 - 3 = 21 Interesting, but the cycle is closing, and I have to choose something. This is not so competitive anymore.
Erta Ale - 27 + 1 = 28 Yes, more volcanoes.
Great Blue Hole - 11
Guilin Mountains - 24
Iguaçu Falls - 28
Kīlauea - 27
Lake Baikal - 21
Lençóis Maranhenses - 30
Underwater Waterfall - 25
White Desert (Egypt) - 24 - 3 = 21 Interesting, but the cycle is closing, and I have to choose something. This is not so competitive anymore.

