This steep cable railway has been hoisting passengers in the heart of Québec City for over a century.

The home and studio of a visionary woodworker now stands as a museum and example of his artistic genius.

America's first nuclear-powered merchant ship is now a time warp to the atomic age.

This Philly cemetery is the eternal home of many famous area residents, including Rocky Balboa's wife.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

Designed by Buckminster Fuller, this relic of the 67 Expo survived fire and ice.

A grand Gothic Revival basilica with stained glass depictions of Montreal's religious history has only one soul resting in its crypt.

A large portion of this navigable canal runs under Paris's famed boulevards.

An underground tropical garden sits inside a Paris Métro Station.

This renovated Art Nouveau bathroom from 1905 is worth the price of admission.

French sculptor Paul Moreau-Vauthier transformed the site of a 19th-century massacre into a haunting memorial.

The remains of the medieval wall that once surrounded Paris with ties to the construction of the Louvre.

If you look closely at the oldest bridge in Paris, you might notice hundreds of ugly faces leering from its sides.

The final resting place of the "father of special effects."

A 400-year-old church covered floor to ceiling in ex-voto offerings from the faithful.

The Sun King's military models, saved from the Louvre.

The spiral staircase hidden inside this giant Parisian column was likely built for Catherine de Medici's astrologer.

Remains of Roman amphitheater hidden in a sleepy quarter of Paris.

A 16th-century fountain marks the site of a lost medieval cemetery once filled with mass graves.

Natural history museum celebrating biodiversity with a parade of taxidermy animals.

This off-limits room in the National Library of France is home to a system of pneumatic tubes, once used to bring books to readers.

This former “ante-chamber to the guillotine” has been refurbished to illustrate the brutal history of French justice.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

Paris' fabled purveyor of exotic taxidermy and natural history curios.