Built to house a chapter of the Knights Templar, this grandiose building is a relic of Freemasonry in Chicago a century ago.

Chicago's North Park Village was once the largest municipal sanatorium in the country.

Beloved bar home to musicians of all eras and reputations.

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

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

A castle built for love, and abandoned due to heartbreak.

A downtown park built on top of unclaimed graves.

A tiny memorial for the year the Connecticut River almost destroyed New England.

An easy-to-miss plaque marks the building that first held this 19th-century telephone innovation.

A tribute to the truly loyal dog who waited outside a hospital for his owner to come back.

An iconic steel and chrome diner from the 1940s left empty for nearly 20 years is in danger of being demolished.

An abandoned gun-funded 19th century utopia.

The former home of Samuel Clemens and family remembers the happiest period of the author's life.

A renegade art installation in a small Vancouver park is now officially sanctioned by the City Parks Department.

This conservatory allows a little bit of the tropics to thrive in the middle of a major Canadian city.

The legacy of baseball great Roberto Clemente is preserved in a retired Pittsburgh fire station.

The only way to see Pittsburgh is from the top of this lookout point, just like the ancient members of the native peoples did.

One of the steepest streets in the United States makes an intriguing challenge for cyclists.

The humble field where the first Major League Baseball game was played.

A daily replay of the experiment that proved the rotation of the Earth.

One of the oldest of its kind.

A clone-tree in Washington Square Park sprung from seeds that went to the Moon and back.

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."