The oldest active church in Pennsylvania is also the second oldest Swedish Church in the United States.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

This little-known collection holds everything from "Dracula" notes, to the manuscript of "Ulysses," to the forged works of Shakespeare.

Canada's oldest sugar maple has been growing since around 1500.

One of the largest underground systems runs under Canada's largest urban center.

A botanically themed auditorium blooms within the world’s last operating double-decker theater.

A former Canadian Pacific Railway station turned liquor store, the first and only station in Canada visited by British royalty.

One of Canada's most incredible rare book collections holds hundreds of thousands of gorgeous tomes that the general public can touch.

A famous burial ground with a history both grim and literary.

What might be the oldest living tree in London has survived fires, bombings, and estate agents.

This medieval church tower has maintained its clockworks since the 16th century.

This 1920s Dutch barge is now a floating bookstore.

There's an exclusive Beefeaters pub hidden in the Tower of London.

A hidden treasure in London with a rich medieval history, and the resting place of many luminaries.

A faded reminder of what was once a common sight in London during the Blitz.

This coffee shop lies hidden beneath a historic church.

The 2,000-year-old beam is tucked within the pedestrian entrance to the old London Bridge.

This Viking gravestone carved in a rare runic style was dug up from a London churchyard.

This overlooked street light once served as a KGB dead letter box.

Charles Babbage's proto-computer, painstakingly brought to life.

A Victorian park cemetery, standing on the site of what was once the Great North Wood.

The London pub overlooks where the Mayflower was moored before setting sail for the New World.

The sixth of London's "Magnificent Seven" cemeteries, and a source of unlikely inspiration to Beatrix Potter.

A cluttered and astounding collection of antiquities and curiosities.