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Blue Cobblestone Streets of Old San Juan

San Juan, San Juan, Puerto Rico
2 Kudos
Viejo San Juan was one of the first cities established by Spanish colonizers in the "New World." The streets were paved with blue cobblestones starting in 1784. The original cobblestones were made using iron slag, the waste from smelting iron, and were used as ballast in ships that came from Europe in the 1700's.

Most of the blue cobblestones have been replaced in an effort to make streets more evenly paved, but you can still see originals on Calle Cristo.
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