Image of a model of the IBM Pavilion at the 1968 World's Fair known as HemisFair '68, held from April to October 1968 in San Antonio, Texas.

Postcard with an image of an architectural model of the Institute of Texan Cultures building, advertising HemisFair '68. It includes printed text on the back about the exhibit.

A postcard of a three-dimensional model of the pavilion of the Pearl Brewing Company with its indoor and outdoor dining facility including refreshment and entertainment areas. In the picture some people are shown canoeing in front of the building.

Two union workers picketing at the HemisFair construction site. One of them holds a sign that reads 'This job is unsafe'.

Postcard of an architect's model of Las Plazas del Mundo (Plazas of the World) HemisFair’s international area, where foreign governments had exhibits. More than 20 countries participated in HemisFair '68.

Exhibit hall with brightly colored exterior walls, one red with a geometric sun, one orange and one blue with a light blue crescent moon with a face, described on the back as the "El Encanto de un Pueblo / The Magic of a People" theme exhibit. This is where the Alexander Girard Foundation collection of folk art, with over 10,000 pieces of Latin American folk art was exhibited. The mini-monorail can be seen just at the right edge.

Postcard advertising HemisFair '68, featuring a color drawing of the San Antonio Convention Center. Description printed on back: "San Antonio Convention Center. Much of HemisFair's unique entertainment and fine arts program will be held in this 2,800-seat theatre, a 10,500-seat arena, and 200,000-square-foot exhibit hall -- the largest single complex of buildings on the site."

Postcard advertising HemisFair '68, featuring a photograph labeled "Sculpture Garden" of several modern outdoor sculptures, near the Pavilion of the United States (left), the United States Confluence Theatre (in the background at right), and the top portion of the Tower of the Americas. Description printed on back: "Tower of the Americas. HemisFair's 622-foot theme structure, is the tallest observation tower in the Western Hemisphere. View from the observation decks or revolving restaurant at the top is up to 100 miles."

The souvenir book for HemisFair '68. The contents includes information about the countries participating, corporate and industrial exhibits, amusements, and food. The Tower of the Americas dominates the cover illustration.

A view of the bottom portion of the Tower of the Americas under construction. The steel frame of the floor for the tophouse is being constructed, suspended several feet above the ground and surrounding the concrete shaft.

Photograph taken from the base of the Tower of the Americas during construction. Only the central concrete shaft has been completed and a segment of the steel frame for the tophouse is shown at the base; a mechanical crane is visible at the top of the concrete shaft.

Photograph of the central concrete shaft of the Tower of the Americas under construction. Workers, trucks, and a mechanical crane are at the base of the tower, and another crane is at the top of the concrete shaft.

An artist's sketch of the Tower of the Americas at HemisFair '68. It includes text describing the Tower at the bottom of the page

Postcard illustration of the U.S. Exhibit Pavilion, one of two buildings that comprised the United States exhibit at HemisFair '68. The Exhibit Pavilion's theme was "Confluence, U.S.A."

Postcard advertising HemisFair '68, featuring a photo from the west side of the United State Confluence Theatre, a 70-foot high round building which had the largest curvilinear motion picture screen in the world. The Francis Thompson film, "Confluence, U.S.A." was shown there during the fair.

Postcard advertising HemisFair '68, featuring a painting of one of Los Voladores de Papantla (the Flying Indians of Papantla) who performed ancient dramatic rituals. In this picture, the a man wearing a traditional costume is standing on a mountain top with his arms outstretched to hold up the edges of a decorated blanket. He is also wearing traditional ornaments and a very elaborate headpiece composed of skulls and feathers.