Staggering photography from the largest cave in the world

[Dannyalcatraz]

Some additional Underdark fodder, in case you missed it:

Cave of Crystal Giants — National Geographic Magazine
(notice the size of the humans in the caves?)
Those caves are super humid, deadly hot, and deep underground- and incredibly gorgeous.

My mind says "Dwarven Temple" or "Sacred Ground"...

 

[Roland55]

My underdark just got more exciting.

Vietnam's Mammoth Cavern - Photo Gallery - National Geographic Magazine

If you love these, also look for references to Lecheguilla Cave in southern New Mexico. A fabulous place ... 'adventured' there in my youth (helped map it out, in the beginning).

Kudos to PC for this link!

 

[Roland55]

Some additional Underdark fodder, in case you missed it:

Cave of Crystal Giants — National Geographic Magazine
(notice the size of the humans in the caves?)
Those caves are super humid, deadly hot, and deep underground- and incredibly gorgeous.

My mind says "Dwarven Temple" or "Sacred Ground"...

I know of this place. You need a special suit to venture in, and you can't stay long even then. Quite stressful, even if beautiful.

 

[Scott DeWar]

I have seen the tv production on the NGC channel. outstanding!

 

[Klaus]

If you want more real-world caves:

Dark Roasted Blend: Caves: The World Beneath the World

 

[grodog]

If you go here today...

Cave Stalagmites Photo – Vietnam Wallpaper – National Geographic Photo of the Day

There's a 1600x1200 HD wallpaper of one of the coolest images!

Let's see, where have I seen that picture before?....:

 

[Knightfall]

EPIC !!!

{I can't give P'cat any more XP right now.}

 

[Aeolius]

how about:
Kawah Ijen sulphur mine
Cueva de Villa Luz
and a personal favorite... Dream Lake

 

[Dannyalcatraz]

Want a nice location?

Here's a Google search I did for images of Hell's Gate, Turkmenistan.

And here's another search...a volcanic eruption triggering lightning strikes.

 

[StreamOfTheSky]

This all reminds me of Cappaocia in Turkey. That one always intrigued me for gaming ideas.

The landscape is somewhat alien looking, though inside has no spectacles like the other caves posted here, and many of the tunnels are man-made. Still, the scope and size of the labyrinthian caverns is pretty amazing.

Part 1 of a Cities of the Underworld episode on it:
[ame=http://www.youtube.com/watch?v=K1X9l9JhPhk]YouTube - Underground Pelasgian cities in Cappadocia ╠01╣[/ame]