3 Ethelbert Terrace, Margate CT9 1RX
Part of the Grade-II-listed Clifton Baths, built by John Boys between by 1824-8, the obelisk-shaped Lido chimney somehow missed out on protected status in 2008, leaving this Margate icon at risk. Check it out, Instagram a picture, then show your support by liking the Facebook page set up to protect it.