These tar pits hold the fossils of Ice Age animals that became trapped in the asphalt deposits here. The fossils were first described by Wellesley College professor William Denton in 1875.
The Gateway Arch, also known as the Gateway to the West, is the tallest national monument in the U.S. Construction began on Feb. 12, 1963, with the last section put into place on Oct. 28, 1965.
The trade center's twin 110-story towers, the planet's tallest buildings when they officially opened in 1973, were destroyed in the September 11, 2001, terrorist attacks against the U.S.
The natural thermal springs in this park, which flow from the Ouachita Mountains, were made a government-protected area by President Andrew Jackson in 1832.
Designed by Max Abramovitz, the hall opened in 1962 as Philharmonic Hall, as the new home concert venue of the New York Philharmonic, after the orchestra moved from Carnegie Hall.
