We've selected 36 of the photos to reflect on how cities across the US have changed in images filled with smoke, smog, acid, oil, trash, and sewage. None of the photos we've selected are pretty ...

MailOnline Travel has selected pictures of some of the world's most breathtaking walled cities and towns to inspire you to book your next historic holiday. These spectacular walled communities ...

In an eight-second exposure, Nicolas Ruel captures the motion, color, and energy of some of the world’s busiest cities. Verdant Victoria Peak overlooks high-rise towers in densely populated Hong ...

Animals are adapting to city life by living in smaller spaces, being active at night, and figuring out how to navigate busy roads without getting hit by cars, National Geographic reports.

neon-colored rain jackets — and allow the viewer to focus on the more massive changes in buildings and cities," Venkatraman said.