Dr. Fleming's work saved the lives of many bullfighters thanks to his discovery of penicillin.

The property contains 37 preserved animal effigy mounds constructed by Native Americans between 800-1100.

More than 12,000 years ago, this park was a playground for mastodons.

A sacred collection of indigenous rock art.

An underground city beneath Krakow's postwar socialist utopia.

Fascinating military history, awe-inspiring wildlife encounters, and endless outdoor adventures draw people to this sprawling park.

This peak in Chapada Diamantina National Park offers the most stunning sunsets.

One of the best places to dig—some say on the planet—for six different types of chalcedony.

In the heart of Panaji, a monument to the pioneer of modern hypnotism.

A serene, almost spiritual place to do one's business. Who knew a public toilet could inspire and awe?

Once known for its eerie appearance, this semicircular monument is all that remains of a Tokyo industrial icon.

This redwood is a historic landmark, a town’s namesake, and the dancing sideline symbol of Stanford University.

The oldest remaining building in Tacoma was once the home of the "oldest bell tower" in America.

A well-preserved example from a 1920s network of airmail navigation arrows sits near Interstate 15 in southern Nevada.

It bustled briefly in the late 1860s, but little is now left at this stage stop on the Hamilton/Pioche Stage and Freight Road

In the heart of Little Sweden USA, a small gallery and museum pays tribute to a Swedish-born artist who fell in love with the American landscape.

In the heart of Tirana, this underground nuclear bunker has been transformed into a museum.

A collection of items seized by the Indian Customs have been kept for display at the Old Customs House in Panaji.

This eerie sculpture overlooks what was known as the Road of Bones under Joseph Stalin.

Featuring a Loretta Lynn display and a re-created coal mine exhibit.

A well-preserved set of ruins not far from Lovelock.

El Paso's only historic house museum is an adobe mansion built by a prominent multicultural borderlands family.

Multiple waterfalls and several historic CCC buildings anchor this state park in Oregon's Willamette Valley.

Inaugurated three times, this tower offers some of the best views of Madrid.