Tolong jelaskan mengenai Silk City. dari Daftar julukan kota di Pennsylvania

Truck Capital of the World.

Bethlehem – Christmas City, USA

Hanover – Snack Capital of the World.

Chocolate Capital of the World.

The Sweetest Place on Earth.Tagline Guru City Branding Survey, Tagline Guru website, accessed August 18, 2009

Indiana – Christmas Tree Capital of the WorldHistory of Indiana County, IndianaPC.org website, accessed December 21, 2008

Lancaster – The Red Rose City

New Castle – Fireworks Capital.

The Athens of America – "References can be found as early as 1733 when the Library Company’s directors wrote, “May your Philadelphia be the future of Athens in America."