One of the largest underground systems runs under Canada's largest urban center.

The largest dune field in the Mojave offers a chance of hearing the 'singing sands.'

The ghost town that ended up on Ebay.

A pair of large white marble lions guard this stretch of the Mojave Desert, and it is utterly mysterious how they got there.

During the 19th century, you could pay for violence off a prix fixe menu on this Manhattan street.

Pulled from the rubble of one of the worst modern tragedies, a steel crossbeam became a symbol of hope for New Yorkers.

Once the tallest building in the world and the site of "the highest dinner ever held in New York" this building now holds the most expensive penthouse in the city.

This anonymous businessman sculpted in bronze became an enduring memorial after 9/11, and had been mistaken by rescue workers for a survivor in the rubble.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

A WWI fighter plane and turn-of-the-century penny candy shop are among the unexpected features of this Financial District building.

In its day this historic fort held 100 cannons pointed in almost every direction to protect New York.

You can still ride this 100-year-old work of art in Brooklyn's largest public park.

Lie in a hammock where George Washington stood.

Sniff the Titan Arum's rotting flesh.

One of the largest public housing complexes in New York once visited by Eleanor Roosevelt.

The longest continuous underwater road in North America was built at the insistence of Franklin Roosevelt.

During the summer, surfers in Alaska take advantage of this inlet’s unusual water patterns.

Buy your friend a drink or staple some cash to the wall for the next guy at the Salty Dawg Saloon.

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

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

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

The ghostly remains of what was once the world's richest copper mine.

The saddest little diner in New York.