On Tuesday, the U.S. Capitol will debut a new underground visitors center that is jaw-dropping in its size and beauty, but also in its whopping $621 million price tag — which represents the best and worst in government expenditure, depending on who you ask.

“They could actually have an educational display on this project … called the Anatomy of a Congressional Boondoggle,” Steve Ellis, vice president of the watchdog group Taxpayers for Common Sense, told The Examiner.