This beautiful stone arch bridge wasn't even expected to stand for one day, but people have been crossing it for centuries.

An overlooked marble is the only surviving in-place 18th century example of the measurement that changed how we define distance.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

The hallucinogenic center of the ancient world.

This somber statue remembers the enslaved women who were forced to nurse their owners' babies.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

An ancient Viking village in North America that predates Columbus by 500 years.

The enchanting archway is the only surviving portal into Dublin's lost medieval wall.

The United States Capitol's former columns still stand.

The alpine falls where Sherlock Holmes apparently met his demise can actually be visited.

This immigrant bridge once spanned the Thames but is now a fixture of an Arizona city.

Most-visited and most-photographed slot canyon in the American Southwest.

The site of Billy the Kid’s most famous escape and the end to the Lincoln County War.

Wee (and not so wee) footprints that insects and reptiles of the Paleozoic Era left behind.

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.

A feminist who put a pretty face on suffrage when she rode a horse through the Capitol.

An activist who committed her life to peace and women's suffrage.

New York City's only radical feminist independent bookstore.

This statue commemorates the meeting of the most influential minds of the women’s rights movement.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

A Northwoods sporting competition that shows lumber jacks doing much more than cutting down trees.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

An artsy hidden staircase leads to breathtaking views of San Francisco.