Scattered around Atlanta are little doors with big charm.

A psychological self-portrait in the form of a giant, segmented head.

Elevated freight railway turned wildly successful urban park.

Detailed facade of a brownstone in Boerum Hill.

Captain America, Sub-Mariner, and the Human Torch were all born in this art deco Manhattan masterpiece.

Rat sculptures try to infiltrate the Graybar Building in an architectural tribute to New York City's nautical history.

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

This study room in the New York Public Library saw the creation of one of contemporary America's greatest traitors.

A terrific purveyor of natural history objects and curios.

Tucked in the back of this amazing antique store is an important piece of medical history.

The site of the deadly Triangle Shirtwaist Factory Fire.

Behind a bodega is a small museum of relics and ephemera showcasing the history of New York.

The one-stop shop for all of your superhero (or evil arch-nemesis) needs.

Two large-scale sculptures of Adam and Eve greet visitors in the nude at the Time Warner Center in NYC.

The 28-foot granite map plots the locations of 40 theaters in New York City.

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

Avoid gangster interaction while window-shopping.

Cryptic messages embedded in the New York City sidewalk.

A historic 1890s architectural masterpiece with an iconic clock tower that, once open to the public, now faces an uncertain future.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

One of the last few places in Manhattan that employed a pneumatic systemic keeps it on display.

A popular European tradition makes its way to the states on one of America's most famous bridges.

The original toys that inspired the beloved children's stories are on display at the New York Public Library.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.