The same holds true for treatments that combine hot and cold water, which have a kind of yin and yang influence on the body.

FORBES: Water, Water Everywhere

It was basic and sparsely furnished, but contained everything I needed for a comfortable stay: a private bathroom with hot and cold water, a bed, air-con, and even a mini fridge and a safe.

BBC: Havana homestays get easier to find

My White Oak Soother body treatment was carefully done (I was asked about any allergies, whether the room and the bath water were too hot or too cold, whether the table and pillows were comfortable).

FORBES: The Pennsylvania Touch

Astronomers call the most promising of these places "Goldilocks planets, " because they orbit in a temperate zone not too hot and not too cold to support liquid water essential for carbon-based life as we know it.

WSJ: Login/Register to set your edition

There is nothing like lying in the hot springs and bracing for a surge of cold sea water.

CNN: ASIANOW - TIME Asia | Travel Watch | Detour

In addition to the hot-water station and sauna for after cold-weather rides, there's a washer and dryer and clothing cabinets for all their cycling gear.

WSJ: A Bicyclists' House Built for Two

Wells are bored and pathways are created inside hot rocks, into which cold water is injected.

ECONOMIST: Inside story: Hot rocks and high hopes | The

New sea bed is constantly being created in the middles of the oceans - flowing out as hot lava, and rapidly cooling on contact with cold deep sea water.

BBC: The Pacific 'Ring of Fire'

Since then, the government has tightened the reigns on the economy and poured buckets of cold water on top its red hot real estate market.

FORBES: Barclays Reiterates 'No Hard Landing' Call For China

Cold ocean water leaks through the rock, hits the red-hot underground lava and bubbles up to the surface.

CNN: ASIANOW - TIME Asia | Travel Watch | Detour