The EWRI Congress participants made it to the Hoover Dam today. #visitascelandmarks . #ewri23

One of the world’s most famous buildings opened #OTD in 1931.

Constructed in a record-breaking 13 months, the 102-story, art deco-style Empire State Building was the world’s tallest building when completed. #VisitASCELandmarks

#OTD in 1975, the CN Tower was completed.

Declared one of the 7 Wonders of the Modern World by ASCE in 1994, the 1,815-foot-tall tower was the world’s largest free-standing structure for 32 years. #VisitASCELandmarks

The world’s 1st modern suspension bridge opened #OTD in 1826.

Designed by the prolific civil engineer Thomas Telford, the Menai Suspension Bridge’s main span was 579 feet, the longest ever attempted at the time: bit.ly/3wy77FF #VisitASCELandmarks

The Hoover Dam was completed #OTD in 1936.

The 726-foot high-arch gravity structure was the greatest project of its time and remains one of the highest concrete dams in the Western Hemisphere. Learn more about the engineering triumph: bit.ly/36DAeOa. #VisitASCELandmarks

Construction was authorized for the 1st U.S. federal highway #OTD in 1806.

The National Road was the precursor of today's federal interstate system and represented the highest standards of road design and construction of the time: bit.ly/4czwZVx. #VisitASCELandmarks

Georgia was founded at the site of Savannah #OTD in 1733.

Savannah’s city plan is the oldest in the U.S. to use a repetitive modular grid with mixed residential blocks & public areas, a concept still emulated by urban planners today: bit.ly/499vzi7. #VisitASCELandmarks

The world’s 1st working railway suspension bridge officially opened #OTD in 1855.

John A. Roebling’s Niagara Falls Railway Suspension Bridge was considered an engineering marvel at the time & became a model for bridges of its kind: bit.ly/3HYEKnh. #VisitASCELandmarks

“Europe has its cathedrals, and we have Grand Central Station.”
- Philip Johnson

Grand Central Terminal opened #OTD in 1913. Learn why the world’s largest station in platform capacity remains a triumph of innovative engineering: bit.ly/3rXpUYp. #VisitASCELandmarks

18 Mar 1855 world�?�+s 1st working railway suspension bridge officially opened. John A. Roebling�?�s #NiagaraFalls Railway Suspension Bridge #VisitASCELandmarks bit.ly/3HYEKnh x.com/ascetweets/sta… - ASCE Headquarters

One of only 12 bridge-tunnels in the world opened #OTD in 1964.

The 17.6-mile-long Chesapeake Bay Bridge-Tunnel, one of #ASCE 's Seven Engineering Wonders of the Modern World, connects Virginia Beach and Cape Charles, Virginia: bit.ly/37kpswx. #VisitASCELandmarks

Another stop for civil engineering tourists! #VisitASCELandmarks

The 1st major cantilever bridge in the U.S. was completed #OnThisDay in Harrodsburg, Kentucky.

The High Bridge was the highest and longest cantilever bridge in the world at the time. Learn more: bit.ly/3xtRi3m. #VisitASCELandmarks