A four story, football field-sized, nine-grotto creation made of shells, minerals, and rare stones.

The house that Frank Lloyd Wright "(shook) out of his sleeve at will" at the age of 86.

The world's last remaining store of its kind.

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

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

The Midwest's reigning king of surplus stores is full of nothing you need and everything you want.

A spooky defunct railroad tunnel now part of a sprawling trail.

When waves crash onto this section of beach, the rocks sing a song.

These mythological giants take time out of their busy day guarding a Victorian market to let you know what time it is.

Every hour a secret compartment drops from this giant pocket watch, revealing a lovely surprise.

This historic Melbourne bullet factory is fully encased in a massive glass and steel cone.

A colorful street named for the legendary Australian rock band.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

The longest continuous lava tube in Oregon.

Its collection contains relics from the devastating disaster that set the town ablaze.

Funhouse of found art and participatory sculpture.

20,000 pieces in a Frank Gehry-designed building.

When flour explodes, it's not a pretty sight.

A mine fire has been burning under the deserted town since 1962, but this church is still going strong.

Find out what it sounds like when doves cry at Prince's recording studio estate turned museum.

The spaceship-like theater, which is still in use, was one of the most popular exhibits at the 1964 New York World's Fair.

Statue dedicated to the star of an old television show.

These Great Lakes sea caves accessible by boat in the summer turn into temples of ice reachable by foot in the winter.

The world's largest fully steerable radio telescope.