I am traveling to Columbia for work for 2 days. My husband is coming along and we are spending a couple nights in DC prior. While I'm in Columbia for work - is there anything for my husband to do? is there a way for him is get around? We have a rental car but I may need it to get to the work meetings. Any info would be great. One night we are heading to Camden Yards for a baseball game - other suggestions would be great.