The Smithsonian, which includes 19 museums and galleries, the National Zoo, and nine research facilities, is the "world's largest museum, education, and research complex." Many of its component institutions provide internship opportunities for undergraduate students; while these internships are competitive, they are an excellent way to enhance and complement what you are learning in your history courses and to give you an opportunity to explore other possible career directions.
Smithsonian internships have learning objectives designed to reflect the interns' career goals or education, and are supervised by mentors in the field. While the initial appointments may be up to six months, interns can also be reappointed pending revised learning goals and an additional commitment by the mentor.
The topics and foci of Smithsonian internships can vary widely, and applications are taken roughly one semester in advance of the start date. For more information about the various internships available and their application deadlines, please see http://www.smithsonianofi.com/blog/2012/12/26/smithsonian-internships.