Roadside collection of 65,000 signs.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

Permanent exhibit reminds visitors of the Exxon Valdez.

The stickered marker pinpoints where the only maintained road in the United States crosses into the polar region.

A morbid gateway to an Alaska town prides itself on the hunting history it represents.

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

A giant poultry statue immortalizes one of Alaska's more humorous town names.

A historic freight system that found the true gold rush is in tourism.

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

This WWII-era military installation once held an entire city within its walls - now, its walls are falling down.

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

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

This colorful creation wasn't always a welcome part of Toronto's Moccasin Trail Park.