But the caves I want to share  with you today are made completely of ice, specifically glacier ice that's formed in the side of the tallest mountain in the state of Oregon, called Mount Hood.
Mas as cavernas  sobre as quais quero falar hoje são feitas completamente de gelo,  especificamente gelo de glaciares, como os que existem  na lateral da montanha mais alta do estado de Oregon, chamada Monte Hood.