Take a look inside this engineering wonder, a structure that surpasses the height of both the Statue of Liberty and the Washington Monument.

FACT CHECK: We strive for accuracy and fairness. But if you see something that doesn't look right, contact us!

RELATED CONTENT

An elephant in New Jersey? In 1881 James Lafferty designed a 92-ton elephant in the town of Margate. The main room inside of Lucy is 16 by 32 feet and at one point hosted boarders.

America's first prison, Eastern State Penitentiary in Philadelphia, became the model for all prisons. It was built in 1829 by the passive Quakers, who believed that solitary confinement was the best way to serve penance.

Get a bird's-eye-view of what the Goodyear Blimp pilots see from the sky.

Herod's Temple was a closely guarded holy site that stood at the center of the Temple Mount.

Sam Riegel was just one block west as the second plane hit the South Tower.

Professor Eric Foner discusses key people and events in the history of the Underground Railroad. He explains how slaves escaped to freedom with assistance from anti-slavery activists.