The Solomon R. Guggenheim Museum in New York is an architectural icon and a treasure trove of modern art. Designed by Frank Lloyd Wright, the museum is famous for its unique spiral structure, completed in 1959 after 15 years of design and construction. Its main gallery features a six-story helical ramp that curves around a central skylight, allowing visitors to view art as they descend the spiral—a radical departure from traditional museum layouts
 
Interesting facts...
The original concept was inspired by ancient ziggurats and possibly by the helical ramp of the Vatican Museums, aiming for a space where visitors could experience art in a continuous flow.
Wright’s vision included features that never materialized, such as an observatory, a movie theater, and even apartments for Guggenheim and the museum’s first director, Hilla von Rebay.