The Middlebury Library offers a wide variety of Musuem Passes for discounted admissions to museums.  Passes may be checked out by Middlebury residents.

Connecticut's Old State House
As Connecticut's original state capitol from 1797 to 1873, the Old State House is regarded as one of the oldest remaining state houses in the nation. At Connecticut's Old State House, you'll find many unique exhibits, historic rooms and over 22,000 square feet for people of all ages to explore. You can choose between guided and self-guided tours including hands-on activity areas for kids of all ages. Admission free (up to 2 adults and 2 children)
Founded in 1958 and accredited by The American Association of Museums, Earthplace maintains a 62 acre wildlife sanctuary with trails, exhibits an interactive natural history museum with wildlife dioramas, houses live wildlife for public viewing and hosts many public nature programs and events. Other activities include a state-licensed preschool and summer camp, and the Harbor Watch water quality testing program. Entry for up to 4 people.
Maritime Aquarium
The Maritime Aquarium is different from most aquariums in that the focus is solely on one body of water: Long Island Sound, the "Estuary of National Significance" just outside our doors. As an arm of the Atlantic Ocean, the Sound is an environment rich in aquatic life...even within sight of heavily urbanized New York City. The maritime population exhibited includes varieties of crabs, lobsters, mollusks (like delicious and economically important oysters and clams), game fish, jellies, sea turtles, sharks (big and small) and - in the winter - visiting seals. $2 off combination ticket (aquarium & daytime IMAX) for up to 6 people
Mattatuck Museum
This unique museum focuses on the work of painters and sculptors who were born or based in Connecticut. Its collection spans the 18th, 19th and 20th centuries. The artists represented in the museum's collection include Paolo Abbate, Abe Ajay, Alexander Calder, Frederic Church, Erastus Salisbury Field, Arshile Gorky, John Frederick Kensett, Peter Poskas, Kay Sage, Yves Tanguy and John Trumbull. The Mattatuck also highlights the commercial and cultural achievements related to the city of Waterbury. This includes a collection of 15,000 buttons, donated by the now closed Button Museum operated by the Waterbury Button Company. The museum also features a regional history exhibit that uses interactive displays, oral histories and historic movie clips to trace the past and present of Waterbury and the surrounding areas in New Haven County, Connecticut.Free admission for 4 adults
Mystic Aquarium
At Mystic Aquarium close encounters of the incredible kind happen every day! Whether you're touching a ray, feeling the splash of a beluga whale, going beak-to-nose with a penguin or exploring the deep sea with the world's only exhibit on Dr. Robert Ballard's fascinating expeditions, you'll be closer to ocean life than you ever thought possible! $5 off admission for up to 4 people
New Britain Museum of American Art
The New Britain Museum of American Art's founding in 1903 entitles the institution to be designated the first museum of strictly American art in the country. The museum features colonial portraiture, the Hudson River School, American Impressionism, the Ash Can School, and the important mural series The Arts of Life in America by Thomas Hart Benton. The museum has an extensive permanent collection for exhibitions and programming, yet also displays a significant number of borrowed shows and work by emerging artists. Admits any 4 people free
New Haven Museum
Three hundred and seventy-five years of history come to life at the New Haven Museum. From the colony’s founding as a puritan village through its growth into a major industrial center and now a thriving metropolitan area, New Haven’s history is brought to life for our visitors, inspiring a rich appreciation of the City’s past, present, and future.Admits 4 people
State Park Passes (Gillette Castle, Dinosaur Park, Fort Trumbull State Parks)
Enjoy a hot summer day at one of Connecticut's beaches, or spend a day with your family enjoying the natural and historical wonders of Connecticut. With sixty state parks to choose from regardless of your interests, Connecticut's parks and forests offer something for everyone. Activities include: hiking, swimming, camping, boating, letterboxing, mountain biking, cross country skiing, snowmobiling, also cultural and historical experiences at Dinosaur State Park, Gilette's Castle and more. Waives vehicle entrance fee for one vehicle with less than 12 passengers. Valid for 2 adults and 4 children at Dinosaur, Fort Trumbull, and Gillette Castle State Parks.
Wadsworth Atheneum Museum of Art
The Wadsworth Atheneum Museum of Art, the oldest public art museum in the United States, was founded in 1842 by Daniel Wadsworth, one of the first important American patrons of the arts. Its collections of nearly 50,000 works of art span 5,000 years and feature the Morgan collection of Greek and Roman antiquities and European decorative arts, world-renowned baroque and surrealist paintings, an unsurpassed collection of Hudson River School landscapes, European and American Impressionist paintings, modernist masterpieces, the Serge Lifar collection of Ballets Russes drawings and costumes, the George A. Gay collection of prints, the Wallace Nutting collection of American colonial furniture and decorative arts, the Samuel Colt firearms collection; costumes and textiles, African American art and artifacts, and contemporary art. Daniel Wadsworth planned to establish "a Gallery of Fine Arts," but he was persuaded to establish an "atheneum," a term used in the nineteenth-century for a cultural institution with a library, works of art and artifacts, devoted to history, literature, art and science. Free general museum admission for 2 adults & 2 children (through age 17)