Calhoun knew the bank well from her 10 years of working there. She dreaded going into the grungy basement vault to retrieve the night deposits.

The old vault has a dark history. In 1921, seven bank robbers herded seven bank directors, two employees and two customers into the unventilated space.

These days, the space has been transformed into a plush sauna with a door from the original vault. There's also a hidden room in the basement where, the local historical society believes, the old bank note printing press survives.

"Rather than carry out the old press, they concreted up the whole room," said Calhoun. "Breaking into that space is my next project."