Cities of the Underworld

1 Istanbul 2007-03-02 2 Scotland's Sin City 2007-04-23 3 Hitler's Underground Lair 2007-04-30 4 Rome's Hidden Empire 2007-05-07 5 Catacombs of Death 2007-05-14 6 City of Caves 2007-05-21 7 New York 2007-06-04 8 London's Lost Cities 2007-06-11 9 Beneath Vesuvius 2007-06-18 10 Freemason Underground 2007-06-25 11 Dracula's Underground 2007-07-09 12 Secret Pagan Underground 2007-07-16 13 Underground Bootleggers 2007-07-23 14 Rome: The Rise 2007-07-30

1 Underground Apocalypse 2008-01-28 2 Vietnam 2008-02-04 3 A-Bomb Underground 2008-02-11 4 Viking Underground 2008-02-25 5 Hitler's Last Secret 2008-03-03 6 Maya Underground 2008-03-10 7 Mob Underground 2008-03-17 8 Prophecies From Below 2008-03-24 9 New York: Secret Societies 2008-03-31 10 Washington D.C.: Seat of Power 2008-04-14 11 Stalin's Secret Lair 2008-04-21 12 Katrina Underground 2008-04-28 13 Secret Soviet Bases 2008-05-05

1 City Of Blood 2008-10-26 2 Tunnels Of Hell 2008-11-02 3 Real Mafia Underground 2008-11-09 4 Secret Sin City 2008-11-16 5 Hitler's Trenches 2008-11-23 6 Barbarians' Lair 2008-12-01 7 Land of Manson 2008-12-08 8 Gladiators: Blood Sport 2008-12-15 9 Secret Holy Land 2008-12-22 10 Under the Rock 2009-01-12 11 Tomb of the Lost Mummies 2009-01-26 12 Gods of War 2009-02-02 13 Alcatraz Down Under 2009-02-09

1 Mayan Apocalypse 2021-09-07 2 America's Military Underground 2021-09-14 3 America's Unmapped Murder Tunnels 2021-09-21 4 America's Ancient Ancestors 2021-09-28 5 The Pirate Queen's Lair 2021-10-05 6 Templars and The Founding Fathers 2021-10-12 7 Secrets of the Ancient Metropolis 2021-10-19 8 The Lost Aztec Colony 2021-10-26