Dive beneath the surface of downtown Tulsa on Aug 9 with TFA's guided underground tunnel tour—a twice-yearly chance to traverse the city's oil boom history.

The tour groups traversed downtown Tulsa. They started at The Mayo Hotel at South Cheyenne Avenue and East Fifth Street, before walking to the 320 South Boston building where they ...

Background: Two security guards would always be waiting in the basement when the doors opened and Waite Phillips stepped off his private elevator at the end of a busy workday.