The guys visit the small town of Perryville, KY, to investigate a Civil War battlefield that saw more than 7,600 casualties. They explore 2 former Civil War Hospitals that are allegedly haunted by the ghosts of soldiers: the John Dye House and the H.P. Bottom House.

The ancient Celts believed that Halloween was the time when the veil between the world of the living and world of the dead was at its thinnest. And for Zak, Nick and Aaron, it means it's a time for spirits to run free. Ghost Adventures spends this Halloween in Transylvania, a region in central Romania, on a quest to contact Dracula and the spirits associated with him. This 2-hour special features the guys' once-in-a-lifetime journey into the heart of Romania and the birthplace of Vlad Dracula.

Zak, Nick and Aaron are summoned to the Midwest to investigate reports of paranormal activity in a house built in 1845. Thornhaven Manor in New Castle, IN, has been abandoned since the 1970s, and this once palatial mansion is now overgrown and rundown, looking every bit the haunted house it is rumored to be.

Zak, Nick and Aaron head to Reno, NV, to investigate the bizarre paranormal happenings at the Mustang Ranch, a modern-day brothel. The Mustang Ranch's history is littered with corruption, death, money, sex and greed, making it a perfect site for paranormal activity.

Zak, Nick and Aaron finally get their chance to investigate America's most famous prison: Alcatraz. The guys arrive on the island after the tourists leave to learn more about "The Rock." The guys also decide to explore the treacherous waters surrounding Alcatraz, so they make their way towards the Golden Gate Bridge, the site of more than 1,600 suicides.

For their 100th episode, Zak, Nick and Aaron visit St. Louis to investigate the notorious Exorcist House, the site of the most famous possession in paranormal history, which was later portrayed in a critically acclaimed book and movie. The guys dig even deeper to learn about the original exorcism that occurred on March 16, 1949.

In celebration of their 100th episode of Ghost Adventures, paranormal investigators Zak Bagans, Nick Groff and Aaron Goodwin look back on some of the most unforgettable moments from the show's previous 99 episodes. The guys take fans on a rollercoaster ride of the highs and lows of their journey over the years. Throughout the special, they will also reveal the top moments in select categories as voted by fans on TravelChannel.com.

Zak, Nick and Aaron answer the call to help homeowners understand the horrors that have plagued them inside their haunted, century-old, Victorian mansion. Lillian Otero and Edwin Gonzalez bought their "dream house" in 2009, but the paranormal events were so overwhelming that they eventually had to move out. The guys are determined to communicate with these relentless spirits to better understand why they keep haunting Edwin and Lillian.

Zak, Nick and Aaron engage in a multi-part lockdown in Santa Ana, CA. Conflict arises when they find the Ritz Hotel under construction, so they add the Santa Ana Historical Society, another haunted location, to the night's lockdown.

Zak, Nick and Aaron travel to Jefferson City, MO, to investigate the infamous cellblocks and prison halls of the Missouri State Penitentiary. The prison was founded in 1836, but it wasn't long before it became known for its bloodshed and violence. Time Magazine once proclaimed it "America's bloodiest 47 acres."

Zak, Nick and Aaron explore the abandoned Tuolumne Hospital in Sonora, CA, hoping to encounter spirits of the miners who passed through its doors during the California Gold Rush of 1849.

Zak, Nick and Aaron head to San Antonio, TX, to investigate the 150-year-old Black Swan Inn, home to a mysterious, dark presence tormenting both the owner, Jo Ann Rivera, and her guests.

Zak, Nick and Aaron journey deep into the Nevada desert to the former mining town of Goodsprings, where they will investigate one of the oldest saloons in the country, Pioneer Saloon. There, they hope to solve the mysteries surrounding the 1942 death of a celebrity in a nearby plane crash.