Taj Mahal, Petra, Christ the Redeemer, Chichen Itza, and modern architecture.
Test your knowledge with these top questions!
What carries visitors up inside the Gateway Arch to its observation deck?
Each capsule seats five passengers and turns as it climbs so riders stay upright along the curve.
The Gateway Arch is a landmark in which U.S. city?
From the observation deck, visitors can look across the Mississippi River to Illinois.
The Gateway Arch commemorates which part of U.S. history?
St. Louis supplied many travelers bound for the frontier, giving the city its "Gateway to the West" nickname.
What metal forms the Gateway Arch's shiny outer skin?
The stainless-steel skin needs no paint; its chromium forms a thin surface layer that helps resist rust.
Which rose-red city did the Nabataeans carve into the cliffs of southern Jordan?
Visitors reach Petra through the Siq, a narrow sandstone canyon that opens onto the Treasury's famous facade.
Which marble mausoleum did Mughal emperor Shah Jahan build for his wife Mumtaz Mahal?
The Taj Mahal's white marble seems to shift color through the day, from pinkish at dawn to golden under moonlight.
Which ancient Maya city in the Yucatan is home to the El Castillo pyramid?
El Castillo's four stairways each have 91 steps, which together with the top platform total 365, the days of a year.
Which landmark statue stands atop Corcovado mountain in Rio de Janeiro?
Completed in 1931, the 98-foot-tall Christ the Redeemer is one of the New Seven Wonders of the World.