So the solstice has come and gone, and now it's officially summer. We may have been living with warm weather for weeks, but now kids are out of school and we're in the window when friends and relatives are more likely to visit. 

Here's some Baltimore discounts via Travelzoo to help entertain those folks, which I found through Baltimore on the Cheap.

Until June 29 you can buy cheaper tickets for the Seadog Cruises speedboat tour for trips through September 30.

You can also tour four historic military ships, including the U.S. Sloop-of-War Constellation and the U.S. Submarine Torsk for the price of one.

The cheapest option are the free Star-Spangled Trails walking tours, which could be a fun diversion, depending on your audience.