The Watch City Steampunk Festival is a retro-Victorian extravaganza, with goggles, corsets, tophats, gears, and steam engines.
(Video link) The weekend event is held near the Charles River Museum of Industry in Waltham, Massachusetts. Scattered throughout the town center are vendors, workshops, films, authors, musicians, and dancers.
I was there (wearing Arthur Denison's coat) to give a lecture on Dinotopia. In this video, a calliope plays John Philip Sousa's The Liberty Bell March, also used by Monty Python.
Watch City Festival