Quite simply the largest tree in the world (by volume).

This charmingly homemade amusement park has been growing for 40 years.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

Only known mainland rookery of the threatened Stellar sea lion.

The first North American landing spot for James Cook on his third voyage of discovery in the Pacific.

The largest wooden building in the world now houses a fascinating collection of aircraft.

No one knows how this Pacific Northwest spruce tree came to have so many trunks.

Two massive rock outcroppings on the Oregon coastline.

A massive sea stack famous for its appearance in The Goonies.

A collection of colorful dinosaurs hidden in an actual rainforest.

100-year-old shipwreck you can walk up to at low tide.

Site of the greatest known waterfall that ever existed.

This small city where almost everyone lives in the same building can only be reached via North America's longest tunnel.

Running under an entire mountain, the longest highway tunnel in North America is kept fresh using portal fans and jet fans.

A tiny wilderness cemetery commemorates the deadliest episode of the Klondike Gold Rush.

A classic gold rush hotel can be expected to pick up some ghosts along the way, and the Golden North is no exception.

A rare chance to get up close and personal with a 13-mile ribbon of ice near downtown Juneau.

The king of U.S. high points towers over every other peak on the continent.

This expansive bridge in the Canadian wilderness was originally just built for friends.

Four-story concrete hotel never opened to customers.

Before he was America’s most famous preservationist, John Muir was an ingenious mechanical inventor.

143 feet of leaping muskie whose mouth can be used as a wedding venue.

One of the last surviving C-97s sits in a field in front of a Wisconsin inn.

Where experiments are conducted on all things wood.