From Nunavut to Tierra del Fuego, you won't find any lighthouse higher than this one.

This restored opera house is named after a soprano known for tragic romance, exile, and a truly uncomfortable wedding.

Milan's duomo is covered in beautiful carving including a curious "dinosaur-like" beast.

Artistic tombs, monuments, and a beautiful "Hall of Fame" lurk inside this cemetery.

The gilded, masterful astronomical clock will calculate time, dates, and planetary positions for thousands of years to come.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

This museum houses an imposing skeleton army comprised of creatures great and small.

France's national museum of scientific and industrial instruments.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

The ruins of a Duke's bucolic dream, where camels once roamed alongside "Dutch" windmills and faux-Italian vineyards.

A museum on the history of Paris, including a set of Napoleon's toiletries, Proust's room, and relics of the Revolution.

This frog-themed restaurant was frequented by Picasso, Saint-Exupéry, and more.

A curious collection of locks and keys.

An all-American grocery store in Paris sells U.S. "cuisine" like Pop-Tarts and Heinz ketchup to homesick ex-pats.

The celebrated eyesore created by starry-eyed sweethearts.

A museum dedicated to one of Paris’s most famous residents, tucked into a corner of one of the city’s most famous squares.

The approximate spot where the last Grand Master of the Knights Templar was put to death.

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

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

This structure atop a craggy cliff in one of the most beautiful parks in Paris boasts an unbeatable view.

A lone cannonball remains lodged in the walls of the Hotel de Sens as a sober reminder of a revolution.

Once a 19th-century brasserie, this McDonald's exterior celebrates Alsatian design and the "King of Beer."

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

The subterranean "lake" below the Paris opera house inspired the Phantom of the Opera's lair.