Cities of the Underworld S0106 - "City of Caves" (21/5/07)

Budapest is built upon on network of natural limestone caves that have been in use since humans first moved into the area. While exploring the caves Eric shares their color history which includes several violent periods in Budapest's past.

Hosted and Narrated by Eric Geller

Originally aired on May 21, 2007 on the History Channel
Episode No. 106

IMDB Page - http://www.imdb.com/title/tt1058623/