The 385-million-year-old fish fossil was discovered in a slab of pavement outside an Inverness townhouse in Scotland, the BBC reported on Wednesday.

Thousands of people are reported to have unknowingly walked over the stone slabs containing the remains. attentionAccording to the media, James Ryan, an employee at the National Trust for Scottish museums, discovered the fossil while out walking.

385-million-year-old fish fossil discovered under paved road https://t.co/0UdcGylZ1V

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“Fish fossils are known to be found on pavements in cities such as Glasgow and Edinburgh, but as far as I know, these fossils have disappeared,” he told media. “These fossils, found on pavement slabs, are ancient fish fossils that date back approximately 385 million years, or about 140 million years before the first dinosaurs.” (Related article: Arizona man discovers hundreds of pre-dinosaur footprints on his property)

According to a BBC report, the stone used in the paving was quarried in the Scottish Highlands. [where the fossils were found] “These rocks were deposited as sediment over thousands of years at the bottom of a huge freshwater lake that stretches from the Moray coast north to the Orkney and Shetland islands,” Ryan said.

This paving stone is “one of the rarest paving stones in the world.” According to Ryan added that neither the palaeontologists he spoke to about the find nor staff at Inverness Museum were aware of the existence of these fossils, the BBC reported.