This headstone marks the grave of an 11-year-old boy killed during clashes in the streets over the boycotting of British goods.

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

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

This bridge was the birthplace of a unit of measurement based on a fraternity joke.

This impressive Boston holy house is the American mecca for Christian scientists.

An enormous, inside-out glass globe built in 1935.

This upscale streetwear store is hidden behind a fake Snapple machine in the back of a deli.

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

One of the last remaining World War II Victory Gardens in the U.S. is quietly growing across from Fenway Park.

The former site of an all-but-forgotten colonial landmark is now remembered by an often overlooked bas relief.

A men’s restroom became a sandwich shop.

American revolutionaries and British soldiers alike are buried here in the fourth-ever cemetery in Boston.

The history of the tea trade is told in bas-relief on this historic pair of Boston doors.

The Boston square dedicated to the dark poet who was born nearby.

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

Statue commemorating the use of ether in anesthesia.

Ruins of a German Castle on top of a towering stone pillar.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

An underground city of salt.

Beneath Kraków Old Town's main square lies a hologram-filled medieval market vampire graveyard wonderland.

An enormous and lavish Gothic church in Czechia.

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

This bar and museum are devoted to the controversial comic book work of Kája Saudek.