The closest would be Baltimore, Maryland (Orioles) and the second closest would be Philadelphia, Pennsylvania (Phillies).
Harrisburg, and beyond that, Philadelphia…
Pennsylvania and New Jersey
The distance from Australia's island state of Tasmania to the closest point on the mainland is around 240 km.
Memmingen Airport (FMM / EDJA). This airport has international flights from Memmingen, Germany and is about 61km driving distance from the center of Ulm.
Cincinnati Reds. It's probably less than 100 miles.
The closest beach to Harrisburg, Pennsylvania is one hundred and sixty eight miles away. The closest beach to Harrisburg, Pennsylvania is in Atlantic City, New Jersey.
The nearest major airport is Harrisburg International Airport (MDT / KMDT). This airport has international and domestic flights from Harrisburg, Pennsylvania and is about 19 driving miles from the center of Mechanicsburg, PA.
The Chihuahuan Desert of west Texas and New Mexico is the closest.
Exton, PA where you can get Keystone service west to Harrisburg or east to New York.
Harrisburg International Airport (MDT / KMDT). This airport has international and domestic flights from Harrisburg, Pennsylvania and is about 14 road miles from the center of Elizabethtown, PA.
Annapolis, Maryland
Harrisburg, and beyond that, Philadelphia…
The closest point of land contact is from the northwestern most corner of Pennsylvania to a point on the southeastern edge of Michigan. This is a straight line distance, not a driving distance. It's 110 miles.
Annapolis, MD is about 32 miles from Washington, D.C. (driving distance) The next closest are: Dover, DE (93 miles) Richmond, VA (109 miles) Harrisburg, PA (116 miles) Trenton, NJ (170 miles)
The closest ocean in the Atlantic, the closest oceans state is probably Pennsylvania.
Detroit
Cornwells Heights, PA which is on the Northeast Corridor and has Keystone Service to Harrisburg.