In the mid-19th century, an eight-sided house was the latest fad.

One of few lasting examples of the brief octagon craze that developed into folly.

Though technically an illegal structure, this eclectic DIY apartment complex is beloved by its residents.

Singapore's last surviving traditional village is hidden among giant skyscrapers and modern infrastructure.

One room inside this building mesmerizes all with its parabolic dome.

What looks like a normal building is really a hollow facade hiding a subway vent.

The most unusual block in Brasília.

An urban laboratory.

A plaque marks the site directly below the mid-air detonation of the atomic bomb over Hiroshima.

Experience park where visitors are told to expect the unexpected.

The Hanshin Expressway goes right through its 5th, 6th, and 7th floors.

An Alabama courtroom where two famous American authors played as children became the setting for a Pulitzer Prize-winning novel.

Journey up the capitol building's cupola for an amazing view of Topeka.

A hidden three-foot-wide house separates these two regal churches.

The unbelievably opulent home built for an infamous newspaperman.

This small city where almost everyone lives in the same building can only be reached via North America's longest tunnel.

A suburban street in Anchorage doubles as a runway, and each home has its own airplane hangar.

The original "capsule building" is a masterpiece of Metabolist architecture.