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This, the first manned spacecraft to orbit the moon, offers a genuine peek into the 1960s space race. The historic photos, space suits, and training module on display all help set the scene.

Thirty-four miniature trains race past skyscrapers, through prairies, and over the Rockies to the Pacific Docks on 1,425 ft (437 m) of track that replicates the 2,200-mile (3540 km) train trip from Chicago to Seattle.

A museum favorite since the 1940s, this 20-ft (6-m) tall model of the human heart would fit inside the chest of a 28-story person. Enter its chambers to see the marvel of human engineering.

Venture down a simulated 600 ft (184 m) in an authentic shaft elevator to discover how coal was extracted in the 1930s compared to today. The mini train ride enhances the underground illusion.

Star of the silent screen, Colleen Moore commissioned the design of this lavish 9-sq-ft (0.8 sq-m) castle and lovingly filled it with over 2,000 one-twelfth-scaled objects, including the world’s smallest Bible.

Both Art Deco design afficionados and rail buffs alike are drawn to this streamlined, vintage Zephyr train with its ground-breaking diesel-electric engine. Onboard visits are by tour only.

A cobblestone, shoplined street gives a taste of 1910 Chicago, with a cinema screening free silent movies and a traditional ice-cream parlor serving sweet treats at present-day prices.

Films shown in this five-story theater make the viewers feel like they are right in the thick of the on-screen adventures. Films on a rotating program are screened about every 50 minutes.

Twelve robotic arms work the assembly line to produce toy top after colorful top in this display of computer integrated manufacturing technology. You can race a robot to see who can trace letters faster, and souvenir tops come gratis.

Take a tour around this 1941 German U-boat: captured during World War II, it looks much as it did then, complete with an Enigma codebreaking machine.