This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

Knoxville’s architectural icon was the symbol of the 1982 World’s Fair, even catching the googly eye of Bart Simpson.

The highest point in Tennessee, Clingmans Dome bears witness to the ravages of one type of insect.

More than 700 species live within this murky marvel of a swamp on California's coast.

Golden Gate Park's historic collection of plants.

A pair of slides and a tree-lined stair corridor have been an urban oasis for nearly 40 years.

The most beautiful Taco Bell in the world even has surfboard parking.

The graffiti-covered remnants of a former triangulation station are balanced precariously on this California peak.

A 1920s speakeasy that had rum runners racing up and down the shores of California.

This replica of the Greek structure is in the heart of Nashville.