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

One Pittsburgh musician's decades-in-the-making memorabilia collection is on display at this rock-n-roll curio shop.

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

Where the "World Pinball Champion” is crowned.

An ode to filmmaker George A. Romero, who used the mall to film an iconic horror movie.

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

Long hidden under grime, the politically radical murals of a little known Yugoslavian master are finally getting their due.

There aren't too many operational funiculars around, but Pittsburgh has two!

A quiet, gothic haven nestled between Pittsburgh's Squirrel Hill and Point Breeze neighborhoods.

A forsaken wonder in the middle of the East Side neighborhood.

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

A tree that defies gravity grows in an ancient ruin.

Virgil's many-mouthed gateway to the underworld.

A sulfuric hellscape in southern Italy.

A submerged archeological park still holds the wonders of a Roman Sodom.