This tower commemorates the spot where George Washington hoisted the Grand Union flag.

A unique columnar residence built in the 19th century.

A home decorated by its owner with eye-catching and captivating assemblages of found objects

Rising 30 feet in the air atop Quarry Hill, the Old Powder House is the oldest stone building in the state of Massachusetts.

This cemetery served as the only official burial grounds in Cambridge for nearly 200 years.

One of the last remaining movie theatres in the country that features a rear-projection system.

Three prestigious academic collections come together to create a world-class natural history museum.

This is the house that spite built.

Massachusetts memorial to murder victim Elizabeth Short near the spot where she was born.

The monument is inscribed, "To Sagamore John and those Mystic Indians Whose Bones Lie Here”.

Dedicated to "the father of U.S. life insurance."

The classic Christmas carol was written at this Massachusetts tavern in 1850.

A hugely vast Irish landscape of barren rock that stretches for miles.

Amidst the bustling streets of Dublin, there is a hushed garden that is dedicated to "All those who gave their lives in the cause of Irish Freedom."

Mortarless walls that stretch for miles are a lovely solution for creating grazing land in the harsh terrain of the Aran Islands.

The modern birthplace of Irish freedom.

Ruins battered by centuries of war and disaster offer a wondrous glimpse of medieval Ireland.

The ruins of a medieval monastery named after a type of tree.

Ireland's most remarkable collection of these curious cone-shaped houses is worth the buzz.

A stunning Victorian abbey and walled garden on a lakefront.

This single room has survived the centuries with almost no deterioration.

The ruins of an 800-year-old monastery boasts the tallest round tower in Ireland.

The somber sculptures commemorating Irish Famine on the river Liffey in Dublin.

While only two of the ancient buildings at this site are actually churches this was one of the earliest Irish pilgrimage sites ever.