Enviromental Hazard Ideas Please

[GameDaddy]

Ice
Ice Fields
Ice Flows
Ice Slides
Ice caverns... with cold pools, or hot springs
Glaciers
Icebergs
Ice Shards
Ice Storms
Volcanic activity
Lava Flows
Hot Rocks
Sauna Caves
Boiling Pools
Flaming Pools
Geysers
Steam Vents
Rockslides
Rockfalls
Flash Flooding Caverns (Raining above)
Sea Caves
Coral Reefs
Coral Shallows
Deserted Isles
Volcanic Eruptions / Pyroclastic Volcanic Flows
Deep Chasms and Canyons
Cavern Waterfalls and Pools
Hurricanes
Waterspouts
Tidal Pools
Whirlpools
Seaweed Choked Seas
Graveyard of Sea Wrecks
Shifting Sand Beaches
Shifting Sand Caverns
Old Secret Tunnels
Decrepit Abandoned Mines
Cenotes or other Water filled holes or vast pits that lead to the Underworld
Heavy Fog
Blinding Rains
Howling Winds
Stormy Choppy Seas
Heavy Surf
White Surf
Dangerous Choppy Seas
Waterfalls and Rocks

 

[RainOfSteel]

[...] is a set of three mechanical rings (isles) spanning hundreds of miles around. Inhabiting these isles are golems and inevitables.

[...]

Any other ideas as to what sort of hazards I could include to spice things up?

Acids
Poisons
Cryogenic fluids
Flammable fluids
Friction Reducers
Friction Increasers (sticky foam)
Fire Suppression (go ahead, cast that fireball)

Also, some systems may well launch sonic effects or attacks.

Large machine presses would do substantial damage to anything caught in them (think the end of Terminator).

There might be lots of narrow walkways without rails where characters would have to make regular Balance rolls or fall into active machinery.

At power generators, you might have some big beams of energy transferring power. It would not be a good idea to come into contact with those beams.

 

[Dandu]

Liquid nitrogen. Deals cold damage, condenses oxygen right out of the air.

 

[Pergentile]

Aerial, Griffon-riding, invisible wizards throwing shrunken boulders.
Giant Orbital Lazer

Wait... what were we talking about?
Oh yeah!

Gravity Wells
Wormholes
Particle Fountains
Anti-matter
Negative Space
Dark Matter
Gates
Fusion

Wait, what were we talking about again... ?