This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

This massive library holds what was once the largest book collection in the world.

Despite being considered a thoroughly American sport, basketball's oldest surviving playing field is found in the basement of a Paris YMCA.

Claude Monet was baptized in this lavishly ornate Paris church.

The spectacular history of spectacles on display.

This plaque marks the former home of one of the first women physicians in the Netherlands.

Sail in for a ’dam good slice.

A clone of a cloned tree that was so important it allegedly had its own guards.

The location of the world's first telescope demonstration.

The original burial place of this preeminent 18th-century Jewish philosopher was razed by the Nazis.

Slaughterhouse Five opens its dank doors to fans of Kurt Vonnegut.

The man who voiced Bugs Bunny, Daffy Duck, Porky Pig, and more has a headstone reading, "That's all, folks!"

A vibrant colony of rescued wolves and other canids.

Haven for Cape Fur Seals, until the Ring of Death of jumping Great White Sharks arrives.

A multiversal transit station located right below a highway interchange.

An unusual waterfall in the Santa Rosa Range, within the Great Basin of Nevada.

The seventh largest spring in the world.

In 1909, the steepest and most difficult piece of track on the Canadian Pacific Railway was replaced with a series of spiralling tunnels cut into the mountains.

This Connecticut video store has a vast and varied archive that contains everything from 'Koyaanisqatsi' to 'The King's Speech.'

An extraordinary house museum and cabinet of curiosities in the heart of Florence.

A forgotten "city of water" underneath the famous Trevi district.

This ancient market is often referred to as the oldest shopping mall in the world.

An ancient Roman temple first dedicated to an emperor's wife is now a church.

A burial vault located under Tiber Island in the middle of the Italian capital.