A lush green oasis in the middle of Chicago.

A haunting statue called "Eternal Silence" has quite the reputation among visitors with active imaginations.

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

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

This whimsical Oz-themed park had a wonderful impact on the surrounding neighborhood.

This striking public art installation is suspended above a public park, designed to gently move in the breeze.

This railway-turned-greenway provides a pedestrian link in downtown Detroit and celebrates urban artwork.

A painted-over wall in Detroit originally built to segregate a black community from an adjacent white development.

Standing guard on top of an old, vacant ice cream shop.

Detroit’s downtown castle is one of the oldest structures in the city.

Advice-columnist's bell tower, paid for with pennies.

These enduring murals depicting a distinctly Marxist tribute to capitalism could not even be defeated by McCarthyism.

The bones of an old zoo crumbling in the shadow of a new one.

The Beaux-Arts aquarium boasts a vast collection of saltwater and freshwater fish on an island in the Detroit River.

This Detroit ruin was once a gothic bastion of its community, but now it stands as a haunting ruin.

Atlanta's strange assortment of concrete pillars inspires reflection in some, confusion in others.

This stone is a marker of one millionaire's personal vendetta against gravity.

This house's itty bitty size means no humans allowed.

3/4-scale model of the White House in Atlanta, Georgia.

Secret gardens just a few miles from downtown Atlanta.

Healing Springs that once ran red with soldiers' blood.

An underground magnet for ever-changing street art.

The beauty of urban decay, hiding some dark secrets.

The oldest continually used church in Minneapolis also sells great meat pies.