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  2. Donald D. Engen - Wikipedia

    en.wikipedia.org/wiki/Donald_D._Engen

    Donald D. Engen observation tower beside the entrance of the Steven F. Udvar-Hazy Center of the National Air and Space Museum The Donald D. Engen Observation Tower at the Steven F. Udvar-Hazy Center is named after him, while the Mary Baker Engen Restoration Hangar is named after his wife.

  3. Steven F. Udvar-Hazy Center - Wikipedia

    en.wikipedia.org/wiki/Steven_F._Udvar-Hazy_Center

    The Steven F. Udvar-Hazy Center, also called the Udvar-Hazy Center, is the Smithsonian National Air and Space Museum (NASM)'s annex at Dulles International Airport in the Chantilly area of Fairfax County, Virginia. It holds numerous exhibits, including the Space Shuttle Discovery, the Enola Gay, and the Boeing 367-80, the main prototype for the ...

  4. Gettysburg National Tower - Wikipedia

    en.wikipedia.org/wiki/Gettysburg_National_Tower

    The Gettysburg National Tower was a 307-foot (94 m) hyperboloid observation tower that overlooked the Gettysburg National Military Park and Gettysburg, Pennsylvania, from 1974 to 2000. [3] The privately owned tower attracted many of the battlefield's visitors, who paid a fee to access its observation decks.

  5. List of Gettysburg Battlefield observation towers - Wikipedia

    en.wikipedia.org/wiki/List_of_Gettysburg...

    Culp's Hill Observation Tower, a 60 ft (18 m) Cope tower southeast of the borough of Gettysburg. Cyclorama Building observation deck, a closed Zeigler's Grove visitor site for viewing Cemetery Ridge and the field of Pickett's Charge. Eternal Light Peace Memorial, a memorial structure with an elevated platform for viewing the battlefield.

  6. Into the heart of CERN: an underground tour of the Large ...

    www.engadget.com/2013-07-02-cern-lhc-underground...

    The two detectors CERN made accessible on this trip -- CMS (Compact Muon Solenoid) and ALICE (A Large Ion Collider Experiment) -- are the real sleeping technological beauties. It's those massive ...

  7. List of tallest observation towers in the United States

    en.wikipedia.org/wiki/List_of_tallest...

    Stratosphere Tower: 350.2 m (1149 ft) 1996 Concrete Las Vegas, Nevada: Tallest observation tower in the United States. 2 Tower of the Americas: 228.6 m (750 ft) 1968 Concrete San Antonio, Texas: Built as the theme structure for San Antonio's World's Fair, HemisFair '68. It was the tallest observation tower in the United States from 1968 until ...

  8. The ancient earthquake detector that puzzled modern historians

    www.engadget.com/2018-09-28-backlog-zhang-heng...

    Only it was created nearly 2000 years ago, before people even understood what an earthquake was. Zhang Heng lived in China during the Han dynasty, and history remembers him as a scholar in many ...

  9. Baltimore World Trade Center - Wikipedia

    en.wikipedia.org/wiki/Baltimore_World_Trade_Center

    The Baltimore World Trade Center is a skyscraper located on the Inner Harbor of Baltimore, Maryland. It is the world's tallest regular pentagonal –based skyscraper (the pentagonal-based JPMorgan Chase Tower in Houston is taller, but is not regular). It was designed by the architectural firm Pei Cobb Freed & Partners, with the principal ...