This Baltimore Basilica is known as America's First Cathedral. I highly recommend their tour, which they offer on Wednesdays and Fridays from 9 AM to 12 PM and also on Sundays following the 10:30 AM Mass. The tour is about an hour and includes the main church, Our Lady Seat of Wisdom Chapel, the crypt, and the Pope John Paul garden. I thought visiting the crypt was very cool. Parking is free on Sundays until noon. On weekends, you can park at their garage for only $5, otherwise it's an hourly rate. Sunday Mass Schedule: 8 AM, 10:30 AM, and 5:30 PM read more