Largest Roman Catholic church in North America.

This stunning blue and gold room changed cities twice before becoming part of the Smithsonian.

The most decorated dog of World War I is preserved in the Smithsonian.

A three-story tower of books about Abraham Lincoln is one of the more unusual monuments to the president.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

This extraordinary Depression-era expenditure was modeled after a postcard of a Mediterranean hotel.

A diorama of the Civil War, fought by cats.

An otherwise quiet campground becomes a bustling medieval town for two weeks every year.

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

"Dark Sky Park" is heaven on Earth for astronomers, one of the rare U.S. locations with no artificial light pollution.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

This rural community has attracted both scientists and techno-refugees due to its federally-mandated lack of technology.

Berkeley Hot Springs presents to you "the only outdoor monument to presidential bathing."

This beloved marketplace mascot poops money and grants good luck.

A tour de force of a fountain, memorializing a man who loved fountains more than anything else.

A daily replay of the experiment that proved the rotation of the Earth.

Dr Barnes' $25 billion private collection of art and arboretum.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

This historic furnace was once used to produce cannonballs during the Civil War.

Cleveland's giant "free" stamp is a nod to the Civil War, but was misinterpreted for years.

This spectacular public market has got meat, fish, vegetables, baked goods, and enough kielbasa for a lifetime.

A particularly creepy abandoned hospital that sparks interest for lovers of the supernatural.

This titanic java kettle is one of the many kitschy landmarks located along America's OTHER famous highway.

This dramatic rail curve was once the target of a failed Nazi attack.