The remains of this 2nd-century Roman temple are incorporated into a modern building.

The spot where the fascist dictator made some of his most famous speeches including declaring war on Britain and France.

A massive marble foot is tucked away in a small alley near the Pantheon.

Plaques on its facade commemorate the Tiber's most destructive deluges.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

A semi-scholarly approach to sex.

A Manhattan courthouse hides a small but scathing memorial to Holocaust injustice.

A terrific purveyor of natural history objects and curios.

An homage to Jackie Gleason's bus-driving character from 'The Honeymooners.'

There must be a pun in this haystack somewhere...

Cheap pizza and all of your naughty bedroom needs housed in a stunning example of Art Nouveau architecture.

A bit of retro transportation flair preserved in the world's largest department store.

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.