Attention Baltimore County Residents! Visit Port Discovery on Sunday, March 18th for our Baltimore County Appreciation Day! Adults will receive FREE admission and children ages two and above will receive $5 off each admission with proof of Baltimore County residence. Baltimore County residents will also be eligible for a 10% Discount on Family Memberships. No other discounts, promotions or coupons apply. Must mention promotion at the start of transaction. Residents must present a valid Maryland Driver’s License or a current State issued Identification Card as proof of Baltimore County residency at the Box Office. Programs and exhibits at Port Discovery are made possible in part by the Citizens of Baltimore County.