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

An interesting decoration on this historic site, this weathervane comes with as many legends as it does questions.

The site where Charles Dickens gave his first public reading of "A Christmas Carol" in the US.

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

A mysterious stone embedded at the base of a historic Boston building.

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

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

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

A morbid secret lies hidden within the beautiful walls of the Boston Athenaeum.

19th-century operating theatre in which the use of ether was first demonstrated - plus, a skeleton and a mummy!

Impossibly life-like natural history models created out of glass by a father and son.

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

An ancient Egyptian temple in the middle of Madrid, Spain.

One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'

Giant topiary dog once played a role in a terrorist bomb plot.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Single runway interrupted by a busy road that cuts across its middle.

Spain's stunning solar energy plant.

The world's largest wooden structure.

The final resting place of the great navigator, or maybe his brother.

$10,000 won in a poker game in 1884 allowed James Draughon to build this intriguing home.

Walk the whole Mississippi River!

The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

A modernist landscape of water and sci-fi concrete.