From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

This easily overlooked memorial immortalizes the scars from the 1956 Hungarian Revolution.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

The largest statue of this convex, homogeneous object with just one stable and one unstable equilibrium point.

This 40-room dwelling tucked within a cliff was built by the basin's prehistoric residents.

These free-roaming horses were once destined to disappear from the land.

These roaring primates were considered a divine creature in the cosmology of the Maya.

The highest peak in Utah is the hardest to reach, but only if explorers choose the hard way.

Despite sitting firmly in the global cradle of the Church of Jesus Christ of Latter-day Saints, this Hare Krishna temple is host to one of the largest color festivals outside India.

The damming of the Colorado River buried an iconic geologic formation before record-breaking drought brought it back.

This reclusive Hopi village in Arizona has been continuously populated longer than anywhere else in America.

Hike the unusual hoodoos and rock formations that form this little-known natural wonder.

America's only nuclear missile silo open to the public.

An urban laboratory.

A 200-year-old building in the French Quarter that was to be Napoleon's home in the New World.

The only rotating bar in New Orleans has been slowly spinning since 1949.

Red sandstone structures dominate this landscape, which has been inhabited for some 5,000 years.

The largest natural travertine bridge in the world is nestled in a small canyon in central Arizona.

One of the largest, oldest, darkest, quietest motel rooms in the world.

In the remote high desert of New Mexico, a strange array of poles beckon fury from above.

Massive mounds of golden sand look like a desert landscape randomly plopped in an Arctic forest.

This ghostly Alaska village still clings to a steep cliffside despite having been abandoned for over 50 years.

This daunting 1st century fortress was purportedly the site of one of the most dramatic revolts of the Jewish-Roman wars.

Get hands on with the technological marvels of the Classical world.