The 340-year-old house that inspired the classic Nathaniel Hawthorne novel.

Statue in Salem of the woman who starred as the witch Samantha in the sitcom "Bewitched."

The only structure left with direct ties to the Salem witchcraft trials of 1692.

Memorial of the Salem witchcraft hysteria in the town of Danvers, where it all began.

This Pennsylvania cave holds evidence of the oldest known inhabitants of North America.

An otherwise quiet campground becomes a bustling medieval town for two weeks every year.

Steepest flood safety railway in the entire world.

The anatomical-pathological collection of a man who changed surgery.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

An ancient neolithic tomb that only sees the sun twice a year.

This small museum is kept in a house that was integral to the genesis of Uncle Tom's Cabin.

The largest earthwork effigy in the world.

A museum commemorating the Donora Smog, which killed 20 people in October 1948 and sparked national outrage over air pollution.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

"Dark Sky Park" is heaven on Earth for astronomers, one of the rare U.S. locations with no artificial light pollution.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

One of the steepest streets in the United States makes an intriguing challenge for cyclists.

When the Austin Dam failed it destroyed much of Austin...and then it failed again.