Constructed on the ruins of a convent, this tower saved countless lives.

This beautiful example of neoclassical architecture is one of Uruguay's most treasured cultural gems.

You have to know where to look in this rather ordinary-looking square to find hints of its past as a dissidents' cemetery.

No one knows exactly how deep the world’s deepest geothermal hot spring is.

An unexpected but incredible collection of wildlife dioramas spanning rainforests, swamps, forests, and plains.

A beautiful geyser under environmental threat.

Where beautiful signs live on forever.

One of the few beardless depictions of Lincoln, George Grey Barnard's 1917 statue was denounced by many—including Lincoln's own son.

Over 120,000 curious objects that have shaped our modern world.

Florida's oldest bar was once a morgue, complete with a hanging tree and gravestones.

The larger of two volcanic peaks rising out of the crystalline waters of the Caribbean.

Come for the springs; stay for the mud bath.

A set of outdoor stairs named in honor of a famous Austrian artist.

The Habsburgs' royal collections of art and wonders.

A spherical "micro-nation" in the heart of Vienna.

Montmartre's sole surviving windmill became an iconic landmark for 19th-century painters, artists, and bohemians.

A graceful natural rock formation stands astride the point where the Gulf of California meets the Pacific Ocean.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

Legend has it the commander of the defenders drew a fateful line in the dirt with his sword just before the final battle.

Three hundred years of preserved Spanish colonial history in San Antonio.

The 10th-tallest pyramid in the world, this former sports arena is now home to a massive Bass Pro Shops store.

For more than 75 years, this living piece of history has been serving exceptional soul food.

The bad-ass ride of a soul legend, housed in one of the world's few soul museums.