Crime and Punishment Museum on 7th street for $6. That's a marked discount from their usual $19.95 entrance fee.
Visitors must have a local I.D. and visit on Sunday to take advantage of the $6 tickets.
For those who aren't locals, a $2 off coupon (hey it's something) is available here. Also, tickets are a couple dollars cheaper if you buy them online.
In November and December, the museum is open from 10 a.m. to 7 p.m. on Sundays, and the last ticket is sold at 6 p.m.