Currency

The United States Dollar (USD, $ or US$) is the official currency of the United States and its territories.

Language

The most widely spoken language and de facto national language in the United States is English (specifically American English). 

Colorado State Capitol in Denver, Colorado
Visiting All 50 US State Capitols

District of Columbia:

Photos of the National Cherry Blossom Festival

Hawai’i:

Black sand beach on Hawai'i
Semester at Sea: Aloha Hawai’i

Maryland:

Crab Feast dinner is a quintessential meal to get in Baltimore.
Must Eat Food in Baltimore, MD
Films on the Pier in Fells Point, Baltimore is a great summer activity
Films on the Pier in Fells Point

Michigan:

Browndog Barlor & Restaurant in Northville, MI
Brunching at Browndog Barlor & Restaurant
Poky Little Wanderer posing with pink classic car at the Woodward Dream Cruise in Detroit, Michigan
Woodward Dream Cruise

New Jersey:

Views of Manhattan's skyline from Liberty State Park
Visiting Liberty State Park
Sculptures at Riker Hill Art Park
Riker Hill Art Park

New York:

Crowds gather for Dyngus Day in Buffalo by Arty's Pub.
Celebrate Dyngus Day in Buffalo
Enjoying the Rochester Lilac Festival in the rain in Rochester, NY
Experience the Rochester Lilac Festival
Crowds gather on Shakespeare Hill to watch Shakespeare in Delaware Park performances throughout the summer in Buffalo, NY
5 Tips for Enjoying Shakespeare in Delaware Park
Beers at RU's Pierogi
Feeling the Buffalove at RU’s Pierogi
Views of Manhattan's skyline from Liberty State Park
Visiting Liberty State Park
Harvested apples while apple picking at Smith’s Orchard
Apple Picking at Smith’s Orchard and Cider Mill
A favorite food in Buffalo is the wing, picture of the wings at Bar Bill Tavern
Must Eat Food in Buffalo, NY
2018 Sand Sculpture at New York State Fair
Experiencing the Great New York State Fair