The largest axe on the planet contains a time capsule that seems like it may never be discovered.

This handsome giant is said to mark the birthplace of the mythical woodsman and even had a cameo in a Stephen King novel.

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

This Pennsylvania cave holds evidence of the oldest known inhabitants of North America.

More than 200 unconventional musical instruments that anyone can play.

The original vault that held the president's remains still stands, empty, not far from where he was finally buried.

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

The Incredible Hulk, Yoda, Mulder and Scully, and many many others watch over the mean streets of Toronto.

An emerald-green grotto just a short trip from Austin.

Locals dubbed it the "Owl Building" because of its bird-like appearance.

Continuing the tradition of the dime museum in style.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

A statue of the early navigator stands overlooking the land he first surveyed.

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

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

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

Where a young athlete began his run across Canada after losing his right leg to cancer.

This rocky spread has been squeezed up directly from the bowels of the earth.

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

Resonating tubes make music from highway overpass.

The site of the little-known Pennsylvania battle that sparked the Seven Years' War.

There are eight natural springs around town, each with a slightly different taste.

Artifacts fill the old headquarters of the hugely influential political movement to ban alcohol in the United States.

This presidential tomb was not dedicated until years after Harding's death due to personal controversy.