Ice caves are not strictly a winter-only phenomenon -- you just have to go to the right place.
Many of the most spectacular examples are in glaciers, formed as summer meltwater widens openings in these ever-shifting rivers of ice. Deep blue glacial ice can cause the light filtering through to bathe everything inside in a spectral glow.
Others are actual caves where, by some geological fluke, the temperature remains below freezing year round, so that water seeping in accumulates into incredible frozen formations.
We did the research and came up with the top ice caves you can visit even when the mercury starts rising again.
-Mark Lebetkin,The Active Times
More Content from The Active Times:
10 Destinations Where the Weather's Always Just Right
The Absolute Best National Parks
36 Stunning U.S. State Parks