This isn't your average roadway—it's actually a National Park and a transportation pioneer.

During the Industrial Revolution this “Temple of Invention” was full of intricate miniature machines and gadgets.

The faint remains of a Polish news empire still linger.

Art in the form of a winding, man made crack in stone.

Olfactory delights in San Francisco's Botanical Gardens.

A goddess-topped water fountain in Chicago was created thanks to the dreams of a thirsty newsboy.

The remains of Martha, the last known passenger pigeon, serve as a tool to educate about conservation.

Two flush headstones mark the only known graves to be embedded in an airport runway.

The oldest house in Manhattan is now a museum that remembers the home's sordid history of scandals, vice-presidents, and ghosts.

One of Frank Lloyd Wright's final works was this UFO church.

This magnificent Cincinnati graveyard is also a popular public park.

Marvel at this turn-of-the-century masterpiece that has been turned into a rather stately supermarket.

Soldiers were buried next to Lee's house in the center of Arlington Cemetery to dissuade the general from reclaiming his property after the war.

Her final resting place was intended to be modest and private, but the power of her popularity continues to draw visitors.

A lush green oasis in the middle of Chicago.

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

Once an ornate movie theater remade by Catholic Charities.

This historic hotel invented the chocolate brownie.

The interior of the Overlook Hotel in "The Shining" was based on this Yosemite original.

This tiny cafe is one of the last meeting places of its kind, allowing revolutionaries a place to plot.

There are lots of hands and feet stamped in the cement in front of Grauman’s Chinese Theater, but Mel left behind something extra.

This stately building in Alexandria, Virginia was built by Freemasons to honor one of their most famous members.

A former major munitions plant that has been converted into a sprawling art space.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.