This Big Apple cathedral may look mighty impressive today but it’s actually still not finished. The idea for a huge episcopal cathedral in New York City was first floated in the 1820s but, for economic reasons, the cornerstone of St. John the Divine wouldn’t be laid until 1892. From then on, building was in full swing, with services held in a chapel of the crypt as early as 1899. It’s pictured here in the continued throes of construction in 1927.

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15 incredible global landmarks that still aren't finished