"This subreddit is exclusively for pictures of infrastructure. Paved roads and other public transit, agriculture, freight, waste management, and water systems are all things we could live without but we really don't want to (and they look cool too)" [more inside]
In northeast India, a giant cliff leads up into a hidden world:
Lothlórien Meghalaya. Nearly two kilometers high and buffeted by monsoon storm clouds, this is possibly the wettest place on earth. Once, twenty-five meters of rain fell here in a year, the world record. Living here poses an unusual problem, and it's not just keeping dry. Nearly all the rain falls during the summer monsoon. Rivers switch from gentle streams to raging torrents. They become wild and unpredictable, and almost impossible to cross. Harley and his niece, Juliana, are busy cultivating a cunning solution. [more inside]
Historic Bridges of the U.S. This is the most complete database of historic bridges I've seen. The front page is blog style that seems to have an emphasis on preservation, and which links to a database that is actively being updated & expanded. You can search by state or by county, and look at each bridge's individual page, including a wealth of stats, and a high-res photo, when available. [more inside]
Construction of the World's Highest Bridge, Millau Viaduct in France, which is slightly higher than the Eiffel Tower. It is now included in a list of Google Earth extremes. World's most interesting bridges. Gallery of beautiful world bridges. [more inside]
Le Viaduc de Millau on the A75 between Clermont-Ferrand and Béziers in France is the world's tallest and most technologically advanced bridge. At 2,460m long and 343m tall, its multi-stayed spans are suspepended from seven pylons. It is not only an engineering marvel, but a work of art. It took 14 years of preparation, but the bridge was built in only 3 years. This film shows how it was built. Here is a live view from the webcam. Previous Metafilter discussion in August 2004 before the bridge opened in January 2005 here.