The demolished Kowloon Walled City in Hong Kong was once a teeming, crime-ridden 6.5-acre metropolis packed with 50,000 people; now it's a peaceful park.

Once as common as the VHS or Beta tapes they rented out, video stores are fading away faster than the images on a well-worn cassette someone forgot to rewind.

The already-aging White House had been retrofit with a maze of modern amenities like plumbing, electricity and heating - none of which were factored into the original plan.

An abandoned building in Taipei serves as an urban laboratory for architecture and design students to incorporate nature and transient structures into cities.

Imagine a view you can control on demand, particularly around annual weather cycles - a fully modular year-round abode, now with a table to match.

From timeless architectural insights to new building technologies, watch these videos and you will never see built environments in the same way again.

Battered by wind, waves and relentless weathering, these 9 abandoned lifeguard towers still stand watch though the watchers have long since left.

Built for some of the world's most extreme weather conditions, the Halley VI Research Station in Antarctica is now open and ready for use.

Concept designs from far-fetched futurists have toyed with the idea for years, but one firm has finally made the vision a reality: towers extensively populated with trees.

This baker's dozen of abandoned bakeries have closed their oven doors for good; victims of flour play, management missed cakes and muffin'd opportunities.