A luxury hotel constructed out of a former jail.

A dedication plaque on this Boston tunnel is a microcosm of a massive, controversy-laden construction project.

Dedicated to a colonial woman who was hanged for being a Quaker.

A gift to the children of Boston, this bronze bear represents playfulness, a spirit of love, and the warmth of big hugs.

Created by a local artist, these quirky sculptures each have their own names and personalities.

The often-overlooked ruins of one of the first buildings designed by famous landscape architect Frederick Olmsted.

The bears may be gone, but their old cages can still be found.

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

Life-size bronzes of the Grinch, Cat in the Hat, Yertle the Turtle, Sam-I-Am, and the Lorax—and the author himself.

Assemble a masterpiece at the first and only North American school exclusively dedicated to mosaic art.

A 19th-century horse lover's bequest led to the construction of this unique fountain in Chicago.

A six-ton wedding present for the King of the Scots.

Touching this 18th-century Scottish philosopher’s toe allegedly conjures good fortune.

These steps offer a breathtaking view of one of Europe's most besieged fortresses.

The most loyal of little dogs, or a Victorian era publicity stunt?

The final resting place of soldiers' loyal canine companions.

The fountain marks the area where hundreds of accused witches were burned at the stake.

Half-sized replica of the Leaning Tower of Pisa built to honor Galileo.

A giant bronze coil of feces is both a tribute to doggie defecation and a reminder to pick it up.

The revival of a classic Art Deco theater.

This mysterious structure by the Washington Monument is a flood barrier designed to protect the White House against rising waters.

Housing the National Women's Party since 1929, this historic house is now a monument to the fight for gender equality.

There’s a hidden military meme engraved on the World War II Memorial.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.