Today's #ThrowbackThursday takes us back to March 2015, when the North Gateway at Gateway Arch National Park began its transformation with the demolition of the old parking garage. Now in its place — a 7.5-acre section of urban greenland that features a natural amphitheater, gardens, walking paths, and the best views of the St. Louis skyline! We've also heard it called a "parking garage for pollinators!" 🦋 | Gateway Arch Park Foundation

524K views · 3.9K reactions | Innovative Road Building Techniques from South Korea. #roadsafety | Asare Obed | Facebook

25 reactions · 27 shares | How to Build a Road Using Roller Compacted Concrete | Highway Engineering | Facebook