They drink from small pools of water or streams.
On the floor! E.g. in hollows where dripping water can accumulate. Often in streams as in surface streams. Or as "gour pools" (aka in USA, I think, "rimstone pools") - formed by calcite deposits forming natural weirs in the trickle of water flowing through them. These can be very beautiful.
They get moisture from their food - also they will (if necessary) seek out pools, streams etc to drink from.
Sure. There are natural pools and streams created by the water that made the cave in the first place.
Raccoons get their water from streams, rivers, lakes, puddles, pet bowls, ponds, and swimming pools.
Streams can slowly join together to form rivers.
Varicose veins form when blood pools in the veins.
Streams that are first forming.
Streams that are first forming.
weathering
Most wild animals get water by simply drinking it from pools and streams. A few get it as moisture from plants they eat.
When two streams come together, it is called a confluence. At a confluence, the two streams merge to form a single stream.