Quite possibly the last cross all humans will ever see.

Niagara Falls holds a special place in Nikola Tesla's history, so they put a statue on it.

Genesis of modern hydroelectric power.

Toxic waste disaster that founded the Superfund program.

A beautifully designed asylum was resurrected as a hotel and art center with a ghost story or two.

The site of William McKinley's tragic assassination is only marked by an underwhelming boulder.

An elaborate memorial to a man local legend says died of a broken heart.

This unique crypt designed by Frank Lloyd Wright for his longtime friend was not completed in either man's lifetime.

The seat of Buffalo government is a gorgeous Art Deco palace.

A 19th-century architectural wonder designed by the "father of the skyscraper."

The absurd creation is a compulsory destination for selfies in Buffalo.

This vessel is believed to be the oldest operating fireboat in the world.

Town full of spiritualists, some of whom are mediums, is still in full swing after 130 years.

A quirky collection of outsider art made from automobile parts.

The Pennsylvania landscape depicted by a quarter mile of mosaics made from used road signs.

Could it have picked a better place to land?

A stone arch leads to a cavernous 1930s spring house tucked away in the Pennsylvania woods.

Color-coded signs direct drivers on a network of routes designed to avoid Pittsburgh traffic.

A restored Pittsburgh house of God has been converted to a marvelous house of suds.

With 3,000 bikes on display, the world's largest bicycle museum includes some famous rarities.

Meet your friends, marry your true love, or tell your enemies to kiss your butt under this historic Pittsburgh timepiece.

Despite being stolen multiple times, this civic electrician's street corner Snoopy won't be stopped.

The last remnants of Fort Pitt also hold the distinction of being the oldest structure west of the Allegheny Mountains.

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