The world's largest fire hydrant is supposedly tornado-proof.

This titanic steel chain linking two buildings was installed without permission but instantly beloved.

This psychedelic tromp l'oeil seems to be beckoning drivers to crash into a wall.

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

The Master of Magnetism dominates the walls of a scrap metal yard to keep graffiti artists at bay.

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

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

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

Found art has transformed this Pittsburgh neighborhood into a psychedelic dream.

A cannonball from Union forces battling John Hunt Morgan made this church a permanent home.

While knives are the main feature in this store, visitors will also find dinosaur bones and meteorites.

This building contains handprints that are well over a century old.

Knoxville’s architectural icon was the symbol of the 1982 World’s Fair, even catching the googly eye of Bart Simpson.

The secret city built by the Manhattan Project.

A roadside music shop featuring a confounding series of folk art installations.