Some of the Old West's most notorious outlaws frequented this mining town.

Crumbling remnants of what was once a booming town full of silver.

A majestic hotel that also stands as a historic relic.

One man has carved a number of natural New Mexico caves into psychedelic sandstone temples.

This popular pitstop lives up to its name.

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.

Built hundreds of years ago this downtown iron barrier once protected a much despised king.

A remnant of the original World Trade Center complex continues to serve as a commuter gateway.

The last living thing to come out of the rubble after 9/11 is now a symbol of hope and resilience.

Now abandoned, the first public health hospital in the U.S. saw more than one million immigrants from around the world.

This memorial honors thousands of enslaved Africans and their descendants who died in colonial New York.

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

Yale University's home for rare works, including the mysterious Voynich Manuscript.

This 3,500 pound obelisk was constructed with more than 1,000 reclaimed guns.

As state high-points-by-elevation go this spot is one of the lowest, but for years it was also the hardest to climb.

A cargo of beautiful music.

A no-frills cinephile haven known for showing offbeat, underseen films.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

New York City's only preserved family home from the 19th century.

This monument to a veteran of the Mexican-American War is one of only two in Manhattan that serve as an actual mausoleum.

The oldest operating apothecary in the US has treated everyone from Thomas Edison to Mark Twain.

This slender three-story building has also had several famous residents.

Manhattan's Thirteenth Avenue was made on landfill then deliberately destroyed — apart from one small, obscure block.

Those belting out show tunes might not realize this piano bar marks the site where Thomas Paine died in 1809.