The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

The oldest stone house in Paris was built by its most famous alchemist.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

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

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

The history of radiation is on safe display at the foot of a radiation science laboratory.

A favorite Paris bar for U.S. expats, including Gershwin, Hemingway, and James Bond.

France's national museum of scientific and industrial instruments.

One of the oldest medical collections in Europe focusing on rare surgical instruments.

Home to a vast and influential collection of Shakespeareana.

During the Industrial Revolution this “Temple of Invention” was full of intricate miniature machines and gadgets.

Franciscan monks created a facsimile of the Holy Land for North Americans who couldn’t afford the trip overseas.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

A Victorian school for poverty stricken waifs has been preserved as a museum to their donated education.

This unassuming building produced some of the world's most famous bells.

A museum wholly devoted to juvenescence.

The lab where the scientist made his groundbreaking discoveries is preserved on the basement floor of the Faraday Museum.

The pioneer of psychoanalysis spent the final year of his life here, still seeing patients on that famous couch.

Artists and musicians now rule over this former rail station.

An small and easily overlooked archaeology museum chock full of Egyptian artifacts.

One of the world's largest collections of pathological specimens.

A collection dedicated to the treatment of disease, held in London's oldest hospital.