Dedicated to the art and science of glass in equal measure, this space is as much laboratory as museum.

Scattered throughout London are ancient remnants of the city's former bounding wall.

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."

The modern birthplace of Irish freedom.

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

The celebrated eyesore created by starry-eyed sweethearts.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

This former “ante-chamber to the guillotine” has been refurbished to illustrate the brutal history of French justice.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

At 207 feet, one of the world's longest continuous escalators.

This lovely, if imposing, piece of Canadian gothic is possibly the most photographed hotel in the world.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

Dim sum, served in a grand old theater.

Narrowest house in Boston.

The world's largest piece of copyrighted artwork.

Shelves covered in dozens of coffee bean varieties fill this North End institution.

Two thousand artifacts from around the world collected by one woman who loved to travel.

Bouncing, delightful, mechanical art at the MIT Museum.

Historic Hull Street was actually the first street with a proper name in the Boston area.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

What was once a true peninsula has now been filled in, causing the water to recede and leaving many streetside "waterfronts" and landlocked "islands."

This massive tea kettle was once a promotional stunt for the Oriental Teashop.