What was the secret to the success of ancient Rome? Aqueducts, underground neighborhoods, and one of the oldest sewer systems reveal many secrets. The largest and most influential empire in history leaves clues to her greatness under nearly every street.

One hundred years ago, Portland, Oregon was a city full of vice, considered the most dangerous port in the world. It was a place where you could get drugs or booze or wake up trapped in a cell beneath the earth.

Four thousand years ago, a mysterious pagan society called the Hittites dug deep into the soft volcanic rock, called tufa, to carve out an intricate underworld. But after almost 800 years of rule, the Hittite Empire vanished without a trace. Where did their people go and what clues have they left behind in their complex subterranean world of Cappadocia?

Visit the city of Bucharest, Romania and learn about its most famous citizen, Vlad the Impaler, more commonly known as Dracula. Travel underground as host Don Wildman explores secret prisons, caves, and dungeons. Only through the bleak subterranean stretches can one come face-to-face with the truth about this infamous Romanian ruler.

Boston and Philadelphia are renowned for their part in America's revolutionary saga, but these cities harbor an unseen connection ... the Freemasons. From the whispers of hidden tunnels and tombs beneath Boston's North End to the incredible waterworld still intact under Philadelphia, the legendary secret society has left behind the blueprints to America's rise. And their enigmatic influence stretches from the Revolutionary Battles of Fort Mifflin to the secret struggles of the Underground Railroad. Host Don Wildman receives exclusive access to newly discovered sites and clues and delves into a part of America's past that can only be revealed in the underworld. We're peeling back the layers of time on Cities of the Underworld: The Freemason Underground.

Naples, Italy narrowly escaped meeting the same fate as its neighboring city, Pompeii in 79 AD when Mount Vesuvius wiped out everything around it. The wind saved Naples that day, but life in the shadow of this massive volcano is unlike any other--and so is it's underground. Explore the neighborhoods, banks, bakeries, and other structures carved beneath Naples by ancient Neopolitans.

For thousands of years, London has been among the most influential cities in the world. Below the busy streets and marketplaces, another city hides--a city of Roman baths, secret crypts, lost rivers, indestructible bunkers that could hold up to 8,000 people, and Winston Churchill's hidden war-rooms; host Eric Geller.

Explore beneath New York City, a living, breathing complex of engineering, history, and secrets that could only exist in America's largest city.

Explore the caves beneath the city of Budapest, Hungary.

Snaking quarries, hidden catacombs, and mushroom-harvesting tunnels lie beneath the city of Paris.

Host Eric Geller discovers what life was like during Nero's tyranny and Augustus' reforms.

This program reviews Adolf Hilter's and Albert Speer's plans for a building boom that would turn Berlin into the capital city of the world. The plan included substantial below ground structures. They built strong and despite the bombing campaigns of World War II a substantial part of the underworld survives for host Eric Geller to explore.

Travel beneath the streets of Edinburgh and discover what has been forgotten, including the remains of body snatchers and outlaw distilleries.

Istanbul is undoubtedly one of the most dynamic and exotic cities in the world. Once the capital city of three of the world's most powerful empires--The Roman, Byzantine, and Ottoman--its strategic location made it the perfect spot for empires to rise, fall...and rise again. Residents of Istanbul walk on top of remnants of these fallen civilizations...literally. Taxis drive over parts of Constantine's Lost Great Palace; children play on cobblestone streets concealing a massive Byzantine dungeon; a high school sits on a 3rd-century wall leading to the bowels of a 100,000 seat ancient Roman Hippodrome; and basement's of old Ottoman homes lead to subterranean tunnels and secret cisterns. Join host Eric Geller as he leaves the buzz of the city streets behind and follows the pull of the past. Teamed with leading archeologists and experts, host Eric Geller peels back the layers of the past--to reveal a hidden history that hasn't seen the light of day for ages.