This historic hotel invented the chocolate brownie.

The subtle science of a master molecular gastronomist.

This innocuous-seeming building is actually the remnant of a major wartime brothel.

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

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

A grotto-like lodge decorated with gilded mosaics, rocks and a noisy waterfall was the setting for the most sumptuous pleasure house of 1900s Europe.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

You haven’t properly toured a winery until you’ve slept in an actual wine barrel.

This medieval tower is all that remains of the castle where Joan of Arc was held before being burned at the stake.

After visiting hours, this picturesque waterfall is essentially turned "off" to be used for hydroelectric power.

On this stunning Scottish island, you can walk in the footsteps of dinosaurs.

This isolated island is often capped by its own fluffy cloud.

When Azorean green tea meets volcanic hot springs water, a luminous brew is born.

Outstanding, eerie frescoes and decorations fill this 19th-century monastery.

Legend says this rock was once a chopping block for public executions.

The lighthouse central to the 1980s horror classic "The Fog" is, in fact, located in one of the foggiest areas of the Pacific Coast.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

In a quiet north Chicago neighborhood rests a stunning relic of the golden age of earthenware design.

William Smith's iconic "map that changed the world" is hidden behind a curtain in the Geological Society building.

The eerie remnants of an ancient forest were hidden under the sand for centuries.

This gaping hole in the middle of a remote mountain lake looks like a portal to another dimension.

The fire inside this temple has burned for more than 1,500 years.

An actual 1957 Cadillac De Ville, encased in 15 cubic yards of concrete.

Three hundred illuminated pillars form an “artificial forest” in Medellín.