This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

A program of Communist glamour in post-Stalin Poland is preserved in this colorful museum.

A landscape of massive spherical boulders are the main attraction in this Kansas State Park.

Marking the spot where a conquistador gave up his search for the fabled Seven Cities of Gold.

Curious rock formations in a tiny Kansas state park.

Nature's biggest mammal swims in landlocked Oklahoma.

These massive mitts are made of 30 tons of devotional bronze.

This striking art museum holds an amazing series of curiosity cabinets.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

Exact replica of the ancient monument, but much, much lighter.

The house that Frank Lloyd Wright "(shook) out of his sleeve at will" at the age of 86.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

A museum dedicated to exhibiting remarkable outsider art.

A monumental statue of RCA's mascot now sits atop a historical society roof after a life of moving around.

This free, take-a-book shop seems like a trick but isn't.

The trials and tribulations of marking Poe's grave.

It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."

Walk through the history of American pop culture.

This English-inspired Maryland garden is home to acres of opulent plant life including bushes shaped into an entire fox hunt.