The source of America's longest river is also a historical landmark and the start of a famous nude run.

Stand at the point where the two mightiest rivers in the United States converge.

A huge railroad museum with over 100 pieces of rolling stock focusing on the railroad history of Pennsylvania.

This small, but beautiful waterfall has attracted visits from artists, composers, and two United States presidents.

A eight-foot-tall statue resides in the heart of Pennsylvania anthracite coal country.

This old-fashioned candy shop, ice cream parlor, and diner served as the setting for one of TV's most controversial series finales.

A modernist landscape of water and sci-fi concrete.

One person's lost luggage is another person's treasure.

Monument to the cotton-destroying boll weevil.

The highest point in Florida is still the lowest high point in the country.

Pensacola's UFO home has withstood many hurricanes—just as the experimental 1960s design intended.

There must be a pun in this haystack somewhere...

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

This magnificent herd of stampeding elephants has been frozen in time for over a century.

Here be dragons.

This taxidermy scene brings the struggle for survival in the Indian jungle to a quiet corner of a Manhattan museum.

This poignant display is now a memorial to these regionally extinct species.

One of the most dazzling dioramas at the American Museum of Natural History is also one of the oldest.

This impressive scene portrays the elusive forest giraffe of Central Africa.

This morbid scene depicts the Darwinian drama of death on the African savannah.

Creating this diorama spurred naturalist Carl Akeley to begin advocating to protect the apes.

An eerie diorama that captures the majestic nature of a few prehistoric-looking beasts.

A room in New York City that contains 250 cubic yards of dirt worth a million dollars.

Plot your trip through the city on the sidewalk.