Diane McGinley pushes a massive vault door in the basement of the former Wyoming National Bank building recently. The vault door has been disabled for safety but will be preserved. (Dan Cepeda, Oil City News)

CASPER, Wyo. — The former Wyoming National Bank building in central Casper has been a distinctive landmark since it first opened in 1964.

Designed by acclaimed modernist architect Charles Deaton, the building added a space-age excitement to the banking and business community at the time.

The Wyoming National Bank was eventually absorbed by larger financial conglomerates, and the building later operated under the Wells Fargo brand for decades.

It has recently undergone a near-complete rehabilitation by current local owners Joseph and Diane McGinley, and is the home of their companies as well as a new events space.

The renovation was overseen and designed by McGinley Companies Director of Operations Diane McGinley, who set out to preserve as much of Deaton’s design intentions as possible.

Also preserved are the odd and mundane aspects of the banking industry, which are still hidden in the long basement tunnels under the stunning building.

There, employees would sort mail, count money in a massive vault, and climb into outdoor teller kiosks shaped like petals. Those curious buildings were unfortunately demolished in the 1970s and replaced with a more conventional drive-up structure, but remnants of their access points still exist. Also downstairs are hundreds of shiny safe deposit boxes in wood-paneled rooms that feel straight out of a 1970s heist movie.

Read more about McGinley’s painstaking restoration of the M Building here. Photos of the building’s hidden curiosities are below.

Further reading: Backstory: When a beloved, aging Casper school was sacrificed for a midcentury masterpiece

According to Diane McGinley, the vault was lowered into position and the building was constructed around it. (Dan Cepeda, Oil City News)
An adjustable vent brought fresh air into the Wyoming National Bank vault, which also served as a counting house, according to Diane McGinley. (Dan Cepeda, Oil City News)
The inside of the vault door at the former Wyoming National Bank building. (Dan Cepeda, Oil City News)
A replica of the familiar sign tower sits in one of the teller access points in the former Wyoming National Bank building in Casper. Several “petal” drive-up teller booths were built along with the original building. The teller would access the booth using a spiral staircase. The booths were demolished in the mid-’70s and replaced with a more conventional design. (Dan Cepeda, Oil City News)
The access point to the outdoor teller booths can be seen in the basement of the former Wyoming National Bank Building in Casper. (Dan Cepeda, Oil City News)
Long-blocked tunnel entrances are seen in the basement of the former Wyoming National Bank building. They were likely used for infrastructure access, according to Diane McGinley. (Dan Cepeda, Oil City News)
A blocked tunnel can be seen at right in the basement of the former Wyoming National Bank. (Dan Cepeda, Oil City News)
Diane McGinley shows an incinerator where sensitive documents were destroyed at the former Wyoming National Bank. (Dan Cepeda, Oil City News)
Wood booths allowed privacy for customers to view contents of their safe deposit boxes in the basement of the former Wyoming National Bank building. (Dan Cepeda, Oil City News)
Copies of ads were kept by bank librarians in binders, which are still preserved in the former Wyoming National Bank Building. (Dan Cepeda, Oil City News)
Rows of safe deposit boxes are seen in the basement of the former Wyoming National Bank. (Dan Cepeda, Oil City News)
Hundreds of keys are left over in the safe deposit box room in the former Wyoming National Bank’s basement. (Dan Cepeda, Oil City News)
Safe deposit boxes were decommissioned years ago. (Dan Cepeda, Oil City News)
The Wyoming National Bank building is seen after its construction in 1964. The teller “petal” kiosks from the original design are seen at top. They were demolished in the 1970s. (Casper College Western History Center)
The former Wells Fargo Bank Building is seen lit up with blue colors in honor of Lt. Daniel Dundas on Oct. 4, 2021. (Courtesy Brian Soffe)
The interior lobby of the Wyoming National Bank as it appeared shortly after completion in 1964. The building’s architect, Charles Deaton, also designed the furnishings, nearly all of which were trashed during previous remodels. (Casper College Western History Center)
The fluid, swooping interior of the Wyoming National Bank building as it appeared shortly after completion in 1964. (Casper College Western History Center)
The Wyoming National Bank building is seen in this undated photo, likely from the early 1970s. Note the shell-shaped buildings near the sign tower. They were the original drive-up teller windows. The sign says “WYO”. The sign would cycle through time, temperature and abbreviations for Wyoming National Bank. (Casper College Western History Center)