A famous alternative culture epicenter and where Joplin serenaded young hippies.

World's largest college campus includes a wildlife sanctuary and a former movie set on more than 28,000 acres.

Controversially claiming the title of world's biggest bass drum, UT's Big Bertha was once made radioactive by the Manhattan Project.

Stone Age solar temple is aligned with the sun on each equinox and solstice.

A National Historic Landmark with a scenic clock tower and park filled with deer and peacocks, plus a military museum.

An acoustic anomaly with a mysterious cause.

An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

For hundreds of years, automatons moving to metallic music have been marking the passage of time.

The only road through the heart of Glacier National Park.

An architect's childhood fantasy treehouse made real.

London's smallest police station is barely the size of a phone booth.

The second oldest continuously operating bar in Louisiana.

Like Mardi Gras, only everyone's a pirate.

Nature took her revenge on the "Wickedest City in the World."

The oldest operating pharmacy in the world features 800-year-old recipes.

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

Dig for your own trilobites in this goldmine of invertebrates.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

Soaring over the Niagara Whirlpool since 1916.

The underground sanctuary of a mysterious ancient cult.

America's most famous piece of self-built architecture.

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

Charles Babbage's proto-computer, painstakingly brought to life.

New fungal and bacterial species call this deadly lake home.