D&D General 7 Wonders of the Natural World(s)

[LordEntrails]

Well, in the Realms, what about?

• the burning rivers of Avernus & Styx aka the River of Blood
• the tree (name?) in Myth Drannor
• The Oasis of Calimstone
• World Pillar Mountains
• Keshtin Falls
• Gloomfrost
• Evermelt
• the Great Conflagration

 

[Eltab]

4e Forgotten Realms:
The Plateau of Thay
Now a mile high and hundreds of square miles big, with a thin ring of earthmotes scattered about from the powerful geomantic magic released. Several spectacular waterfalls go over the sheer edges of the mega-mesa. One road (well-defended) has been built up the southern side, stretching between the capital city atop and the seaport below.

 

[Davies]

The Underdark, as it is in most settings, would qualify as a natural wonder all its own. (Though it may not be strictly natural in some settings.)

 

[GuyBoy]

Icewind Dale. A dangerous place for sure, but the beauty of the crystalline snow and icy peaks in the frosty air is something to behold.

Meanwhile, sunset over the Nyr Dyv in Greyhawk is a wonder to see.