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

The smallest island in Manhattan is a manmade landfill dominated by a Buddhist peace arch.

Amid the marketing blitz of modern Times Square is an elegant holdover from its showbiz glory days.

The famous facade of Grand Central Terminal hides a regulation tennis court, and it's not the first one.

A simple plaque remembers an act of WWI terrorism that obliterated an island and forever scarred the Statue of Liberty.

Twice a day one of these tragic bronze mariners drowns with the tide to remember all those the sea has taken.

These aggressively sustainable art homes look like something out of 1970's science fiction.

The superstar of Cold War nuclear bunkers has been featured in countless films but is now barely operational.

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

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

This Italian foot path winds through the mountains via 52 individual tunnels.

This bridge was the birthplace of a unit of measurement based on a fraternity joke.

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

An Alaska livestock farm devotes itself to harvesting wool from creatures that once ran with mammoths and sabertooth tigers.

These powerful, if squat, Canadian waterfalls flow in different directions depending on the time of day.

The filming location of a shark attack in Steven Spielberg's famous shark movie.

This centuries-old pueblo church houses the body of a Franciscan friar who is said to be a rare "incorruptible" corpse.

Buried beneath the New Mexico sands are believed to be millions of copies of Atari's E.T. video game.

The oldest living organism in New York City. Maybe.

A natural arch carved by a river gave its name to the so-called "Cave of Forgotten Dreams."

Natural sonic phenomenon comes with a grisly legend of murder and blood.

Breathtakingly blue walls shimmer inside the "Glacier Behind the Town."

A swing to dangle you off the very edge.

A cave interior in the shape of the ancient rhinoceros, created by lava cooling around its carcass.