The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

American bison herd descending directly from a Bronx Zoo breeding program that saved the species from extinction.

The largest land animal skull ever discovered.

Yale University's home for rare works, including the mysterious Voynich Manuscript.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.

A traveling postal dog covered 48 states and more than 140,000 miles, and he lives on as taxidermy, patched up with a rabbit's foot and a pig's ear.

Giant acorn-shaped 19th century gazebo from which suburban Washingtonians gazed upon the original "silver" spring.

Remnants of a storybook amusement park hidden behind a strip mall.

A museum dedicated to exhibiting remarkable outsider art.

Walk through the history of American pop culture.

The largest ancient burial mound in Ohio.

Final resting place of Geronimo, Quanah Parker, and the first atomic gun ever fired.

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

The land is home to swimming ponies and a legendary 18th-century treasure.

Beautiful Gothic-inspired lighthouse stands out among the run-of-the-mill striped fare on Bodies Island.