• Explore the National Museum of Mathematics. This educational institution emphasizes exhibits on patterns and structures aimed at elementary students, but also holds greater depth for adults.

• Admire the historic Beaux-Arts architecture of the 69th Regiment Armory, built from 1904 through 1906 to house the New York Army National Guard’s 1st Battalion, 69th Infantry Regiment, otherwise known as the “Fighting Irish,” following the Battle of Gettysburg. This building has been registered as a National Historic Landmark since 1965.

• Pose in front of the Flatiron Building, architect Daniel Burnham’s iconic 1902 triangular tower, the name derived from its clothes iron look.