U.S. States

On May 1, 1931, the Empire State Building was dedicated. The 103-storey skyscraper was the tallest building in the world - a record it held for almost 40 years. President Herbert Hoover turned on the building's lights with the push…

We've visited a few solar power generation facilities in the past, but here is a roundup of solar power towers - elevated structures surrounded by movable mirrors called heliostats. The mirrors concentrate solar energy onto receptors in the tower where…

The latest frontier for Google's Street View technology is underwater. Cameras have visited quite a number of popular diving and snorkelling locations, giving us spectacular imagery of sea life and coral reefs. Today we're taking a tour of these locations,…

From the late 19th century to the period between the World Wars, hundreds of airship hangars were built in Western Europe and the USA to house the massive lighter-than-air craft. Today, only a handful of these huge structures remain, including…

Floating bridges, while often temporary structures used in times of war or disaster, can also be used long-term in locations where water conditions are very sheltered. The road surface is supported by pontoons, which - while they do float -…

The ancestor of the modern stadium, amphitheatres have played host to large-scale cultural and sporting events for thousands of years. The tradition continues today as hundreds of amphitheatre venues have been constructed to host concerts and plays, often in natural settings.