To find the "unicorns of the deep" you've got to go downstairs.

These pretty kitties killed and ate as many as 135 railway workers.

A monument to the art of slicing people open.

This alley in downtown Chicago held the bodies of over 600 people after the fateful Iroquois Theatre fire.

All of Chicago's wood-paved streets are long gone but two alleys remain.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

This work of art was designed to represent the Tarpeian Way Quarry that once dominated the area.

Hidden within Sydney’s lush Royal Botanic Garden is a walled cactus rockery and the site of Australia's first zoo.

A rare specimen of an iconic extinct animal in downtown Sydney.

The bones of this aquatic dinosaur turned to opal over the centuries and the beast's remains were almost sold as jewelry.

The statue honors an adventurous seafaring cat.

Come for the flowers, stay for the bats!

A collaboration of art and ornithology mourns the calls of Sydney's lost birds.