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The Crude Helium Enrichment Unit in the Cliffside Gas Field. Remnants of the Amarillo Helium Plant in 2015. The National Helium Reserve, also known as the Federal Helium Reserve, is a strategic reserve of the United States, which once held over 1 billion cubic meters (about 170,000,000 kg) [a] of helium gas.
These include New Castle Court House, the first capitol of the state; Fort Christina and the Old Swedes Church, site of the first Swedish colony in America; Dover Green; the John Dickinson House, the plantation owned by founding father John Dickinson; and Brandywine Valley nature reserve. [123] Fort Sumter and Fort Moultrie: South Carolina
This is a list of properties and districts in Washington, D.C., on the National Register of Historic Places.There are more than 600 listings, including 74 National Historic Landmarks of the United States and another 13 places otherwise designated as historic sites of national importance by Congress or the President.
The District of Columbia, capital of the United States, is home to 78 National Historic Landmarks.The National Historic Landmark program is operated under the auspices of the National Park Service, and recognizes structures, districts, objects, and similar resources according to a list of criteria of national significance. [1]
This page was last edited on 10 October 2023, at 10:52 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
National Mall and Memorial Parks (formerly known as National Capital Parks-Central) is an administrative unit of the National Park Service (NPS) encompassing many national memorials and other areas in Washington, D.C. Federally owned and administered parks in the capital area date back to 1790, some of the oldest in the United States.
City of Rocks National Reserve in Idaho. National reserves are partnerships between federal, state, and local authorities. Within the boundaries of the three national reserves are combinations of federal land (Park Service or National Wildlife Refuges), state parks and forests, local public lands, and private properties.
The four national parks and protected areas spanning the border between the United States and Canada contain the world's largest non-polar ice field and numerous large glaciers. The area, shaped by glacial and continuous tectonic activity, comprises different types of habitats, from high mountains above 16,000 ft (5,000 m) to ocean, coastal ...