Texas's oldest prison, operating since 1848 and site of over 300 executions, where staff and investigators report voices from the long-shuttered death row block.
815 12th St, Huntsville, TX 77340
Research updated June 2026
Age
All Ages
Cost
Free
The Walls Unit is an active state prison — interior public access is not available. The adjacent Texas Prison Museum (across town at 491 State Hwy 75 N) offers public exhibits including Old Sparky. Exterior drive-by observation only.
Access
Limited Access
Active correctional facility exterior; public sidewalks and roadway observation only.
Equipment
No Photos
Est. 1848 · Oldest Prison in Texas (1848) · Site of Over 300 Executions by Electric Chair (1924-1964) · Old Sparky Electric Chair · Raymond Hamilton (Barrow Gang) Execution 1935 · Current Texas Execution Facility
The Walls Unit was established in 1848, two years after Texas joined the Union, making it the oldest continuously operating prison in the state. Construction relied on convict labor using bricks manufactured on-site, a practice that continued as the facility expanded through the late 19th century. The prison's defining architectural feature — its high red-brick perimeter walls — gave the facility its informal name and made it a landmark in downtown Huntsville.
The facility's execution history is central to its reputation. Texas acquired its first electric chair in 1923; executions by electrocution began in 1924. The chair, nicknamed Old Sparky, was used in 361 executions between 1924 and 1964. The original death row occupied the first floor of the east building, a section that was taken out of regular use in the 1950s after death row was relocated elsewhere in the facility. Old Sparky itself was moved to the Texas Prison Museum after its retirement.
Notable executions at the Walls Unit include that of Raymond Hamilton in 1935 — a member of the Barrow Gang who participated in the Eastham Prison Farm breakout that freed Clyde Barrow in 1934. Hamilton was convicted of multiple murders and died in the electric chair.
Lethal injection replaced electrocution in Texas in 1982, and the Walls Unit remains the designated execution facility for the state. Texas has carried out more executions than any other state in the modern era. The facility continues to operate as an active Texas Department of Criminal Justice unit housing several hundred inmates.
Sources
The paranormal lore around the Walls Unit centers on the original death row — the first-floor corridor of the east building, used for executions from 1924 through the 1950s and now largely unoccupied. The space and its connecting catwalk occupy a distinctive position in the facility: physically removed from active operations, associated with over three decades of executions, and minimally altered since its active use.
The most specific account in circulation involves a correctional supervisor who reportedly conducted an investigation of the old death row section on a Halloween night. According to accounts documented by Texas haunted-location writers, the supervisor captured audio of a disembodied male voice — the phrase 'Hey captain' — coming from the empty corridor. The account is detailed enough to suggest an internal incident report or firsthand conversation as the source, though no primary documentation has been cited.
Cell doors clanging in the unused east wing — without evident mechanical cause — are the most frequently mentioned ongoing phenomenon. Texas Escapes writer Dana Goolsby documented multiple staff accounts of sounds coming from the old death row section during otherwise quiet periods.
The catwalk connecting the east building's upper levels to the main prison structure is also named in investigator accounts, with reports of footsteps that stop when anyone approaches. These accounts are difficult to separate from the ambient sounds of an active, aging prison, but staff familiar with the facility's normal noise profile have described the catwalk sounds as distinct.
The Walls Unit is an active prison; no public paranormal investigation access is available.
Notable Entities
The Walls Unit's brick exterior and distinctive red-brick walls are visible from 12th Street in downtown Huntsville. The facility remains active as a Texas Department of Criminal Justice unit and the site of all Texas executions. Public access is restricted to the surrounding streets.
Every HauntBound history is researched from documented sources. We clearly separate verified historical fact from paranormal folklore.
Austin, TX
The Travis County Jail was built in 1876 at the corner of 11th and Brazos Streets in Austin for $100,000. The two-story castle-style stone structure with two-foot-thick walls held nine men who were legally executed on the premises between 1879 and 1918, along with notable inmates including outlaw John Wesley Hardin and writer William Sydney Porter (O. Henry). The jail was demolished in the early 1930s; the Dewitt C. Greer State Highway Building, headquarters of the Texas Department of Transportation, opened on the site in summer 1933 and was listed on the National Register of Historic Places in 1998.
Florence, AZ
Built by inmates and opened in 1908 to replace the Yuma Territorial Prison, the Florence complex became Arizona's sole execution facility in 1910. Roughly 100 executions have been carried out there — by hanging until 1934, then by gas chamber, and later by lethal injection. The facility includes the original death row cell blocks and the execution chamber that has been in service across three distinct methods of capital punishment.
Hanford, CA
The Bastille served as Kings County's jail and sheriff's headquarters from 1897 to 1964. Built by the Exeter Granite Works at a final cost of roughly $14,000, it was designed to hold 60 inmates but held more than 260 by the time it closed. Its crenellated octagonal tower and heavy granite construction gave the building its enduring nickname.