This is all that is left of a Portuguese bread oven at Hawaii Tropical Botanical Garden. It was found when the land was cleared to make the garden and dates back to the early 1800s, when immigrants came to the island to work in the sugar cane industry.
Graham's Island 
If you didn’t tell me what it was i would never had guessed
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I wouldn’t have either without the handy sign, but I like the mossy covering and the surrounding foliage regardless.
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I did as well
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