No, this is not sign celebrating All Hallow's Eve. The Paris metro entrances were designed in 1900 by architect Hector Guimard, who festooned them with cast iron gates and a distinctive Art Nouveau lettering -- which at first may appear to be melting, but are in fact flora-inspired. Photo courtesy of mr_t_in_dc Photo 1 of 10 in The Design of the Paris Metro by Tiffany Chu

The Design of the Paris Metro

1 of 10

No, this is not sign celebrating All Hallow's Eve. The Paris metro entrances were designed in 1900 by architect

Hector Guimard, who festooned them with cast iron gates and a distinctive Art Nouveau lettering -- which at first may appear to be melting, but are in fact flora-inspired. Photo courtesy of mr_t_in_dc