A subterranean shelter remains intact under a busy Paris railway station.

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

Ghost town with a beer-drinking goat for mayor.

The gloomy ruins that inspired Bram Stoker to bring Dracula to life.

This ancient Chinese observatory still contains early astronomy technology.

This lab's maddening silence is good for business but bad for sanity.

A seven-story 1920s mausoleum outside Denver houses thousands of remains.

Herman Melville wrote 'Moby Dick' in this landmark 18th-century house surrounded by farmland.

This otherwise innocuous bodega was once the headquarters of the most feared assassin's guild in American history.

A fiery crater has been burning in the Karakum Desert since 1971.

A church of bones, decorated with 40,000 human skeletons.

A memorial to Chinese freedom in the city where American freedom was born.

A beacon atop a downtown building provides Bostonians with weather forecasts and baseball news.

This memorial honors those who served on Gallops Island Radio Training Station during the second World War.

The location of one of the first private Catholic schools in the country, providing a valuable sanctuary during the tumultuous period when Protestant and Catholic students were at odds.

What may be Boston's finest Art Deco building, located in the city's Financial District.

A school used as a model for public education across the country.

In the 19th century, this was the center of Boston's Black community.

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

In 1958, an MIT fraternity pledge laid down on this bridge and instituted a new, unique unit of measurement.

The last remaining 19th-century tenement from Boston's old West End neighborhood.

A real plaque marks the spot where a Faulknerian character committed fictional suicide.

Around 160 years ago, this spot marked the location of a wharf along the shores of the Charles River.

This beautiful architectural gem was the first waste treatment facility in Boston.