A layered tribute to the work of mosaicist Isaiah Zagar.

A daily replay of the experiment that proved the rotation of the Earth.

This elaborate towering structure was once famed for its revolutionary height.

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

Yemen's "Stone Palace" looks like it was carved right out of the tall stone column on which it is built.

A city built from mud and known as the "Manhattan of the desert."