The first potato patches in North America were established in 1719, most likely near Londonderry (Derry), NH, by Scotch-Irish immigrants. From there, the crop spread across the country.

The selection of the purple finch (Haemorhous purpureus) as a symbol of New Hampshire was supported by the Audubon Society of New Hampshire, the New Hampshire Federation of Garden Clubs, and the State Federation of Women's Clubs.

The New Hampshire quarter shows the state's most famous natural rock formation, the Old Man of the Mountain. His rock face is 25 feet wide and measures 40 feet from chin to forehead. Geologic events carved this profile into the granite ledges 200 million years ago, but freezing and thawing opened fissures in the Old Man's "forehead", and the formation collapsed on May 3, 2003. Dismay over the collapse was so great that many visitors paid tribute by leaving flowers.

Mount Washington, called Agiocochook by some Native American tribes, is the highest peak in the Northeastern United States at 6,288.2 ft (1,916.6 m) and the most topographically prominent mountain east of the Mississippi River.

In 1623, William and Edward Hilton settled Cochecho Plantation, adopting its Abenaki name, making Dover the oldest permanent settlement in New Hampshire, and seventh in the United States.

America's Stonehenge is an archaeological site consisting of a number of large rocks and stone structures scattered within the town of Salem, New Hampshire. The site was first dubbed Mystery Hill by William Goodwin, an insurance executive who purchased the area in 1937. Some claim that the site has a pre-Columbian origin, but others believe it to be an early-20th century hoax, possibly orchestrated by Goodwin himself.

The Russo-Japanese War (1904-1905) officially ended with the Treaty of Portsmouth, whose negotiations took place in Portsmouth, New Hampshire. The peace agreement marked the first and only time a foreign war has concluded on U.S. soil.

The main island on which New Castle sits is the largest of several at the mouth of the Piscataqua River and was originally called Great Island. On June 11, 1682, Great Island reportedly experienced a supernatural event--a Lithobolia, or "Stone-Throwing Devil." Hundreds of stones mysteriously rained down on George Walton's tavern. Walton, who was involved in a property dispute with his neighbor, accused her of witchcraft. She, in turn, accused him of being a wizard.

The purple lilac (Syringa vulgaris) was first imported from England and planted at the Portsmouth home of Governor Benning Wentworth in 1750. It was adopted as the state flower in 1919.

Often called the "Queen City", Manchester is the largest city in New Hampshire and northern New England. It's nickname comes from the fact that it is larger than the state capital, Concord.