USA Washington stamp

This 1861 stamp of the United States features a profile of George Washington, its first president whose term of office lasted from 1789 to 1797.

USA postmark New Philadelphia

Yep, New Philadelphia is in Ohio, not Pennsylvania.

The city's layout, however, was based on the design of Philadelphia, which is in Pennsylvania!

USA postmark San Juan

San Juan is the capital of Puerto Rico (a territory of the United States).

Founded by the Spanish in 1521, it's named for John the Baptist.

Like the Philippines, the initial stamps of Puerto Rico when the Americans emerged as victors in the Spanish-American War were overprints of US stamps.

The spelling in the overprinted stamps is PORTO RICO.

USA postmark McKee's Rocks

McKees (no longer spelled with an apostrophe) Rocks in Pennsylvania is just a borough with a population of just over 6,000 inhabitants in 2010 (the most recent United States national census).

USA postmark Wilmington

Wilmington is the largest city in Delaware, United States.

But "largest" is relative: it's only 44 square kilometers in area!

USA postmark Bridgeport

Bridgeport in Connecticut is nicknamed "The Park City" because of its widely known public park system in the United States.

Estonia UN

The 50th anniversary of the United Nations was commemorated in this 1995 stamp.