Inside a modern Leather tannery
A German tannery that uses the chrome tanning method
Visit the Heller Leder tannery in Germany.
An Italian tannery that uses the vegetable tanning method
This is a slightly smaller tannery in Tuscany. The tanning ingredients used may differ (chrome vs. vegetable tanning) but you'll notice that the steps are almost identical.
A visit to the HOrween Tannery in Chicago
Ian Anderson from the Squalor to Baller style blog, wrote a nice article about his visit to the Horween tannery. This is America's most famous tannery and its leather is known world wide. My thumbnail image credit goes to him too. Thank you Ian!