The world's longest known cave system.

Inside houses a vast collection of military aircraft and missiles spanning the ages.

An office built to look like a giant basket.

Georges Seurat’s pointillist masterpiece has been recreated in Ohio in topiary form.

Just outside the Ohio Supreme Court sits a testament to justice.

An unassuming 13-acre park is home to over 12,000 roses.

This small, nautical gift shop is home to a 500-pound behemoth.

This giant roadside goose has been hailing travelers into a small Ontario town for over 50 years.

Accessible only by train, the beauty of Agawa Canyon Wilderness Park is worth the journey.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

Strange physical sensations and optical contradictions keep visitors coming back for more.

This little barrel-shaped cottage by Lake Superior was once a cartoonist's summer retreat.

Beautiful scenery, history, science, and physics come together in this remnant of shipping lore.

Amid rushing rapids, this small bit of land is an important First Nations site on border between Canada and the United States.

The world's only bushplane museum captures the spirit of the early planes and pilots and their contributions to northern life in Canada.

Watch the ships come in on Michigan's 210 ft. high observation deck in Sault Ste. Marie.

One lonely, modern pyramid has gone from corporate think tank to deserted boondoggle.

The Kalamazoo factory has 100 years of instrument-making, and one big wartime secret.

The writing studio of an American adventure author, built in the style of a medieval castle.

Lovingly nick-named the "Brick Dick" this municipal tower was winner of the World's Most Phallic Building Contest.

Astounding collection of coin-operated games and automata.

Inside the Wayne County airport is an amazing collection of lights and sounds.

The 80-foot tire that looms over Michigan's I-94 was once a Ferris wheel in the New York World Fair.

The only surviving prototype for Buckminster Fuller's house of the future.