Urban Planning

The narrow passages will challenge even the bravest driver.

This multi-level, aqueduct-footbridge hybrid is one of the greatest works of the Spanish Renaissance.

This unusual subway stop was originally a real estate office.

A wonderfully preserved example of London's 1960s-style high-density, low-rise public housing.

Head underground and take a tour of the city's working sewer system, and see the underground river Senne, which defined Brussels for centuries before being covered in the 19th century.

One of the most spectacular bridges in Spain spans a narrow chasm that divides the city of Ronda.

Discarded animal sculptures stand forgotten by an abandoned aquarium and water park in Bosque de Chapultepec.

This ordinary street was made infamous by a legendary visit from the devil.

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

This park feels like a lush little jungle full of wildlife nestled within São Paulo.

This ''hidden'' 19th-century bridge played a simple, yet important role during the Spanish-American War.

The sophisticated hydraulic system of the Nazca civilization.