A classic carnival ride that was carved to be untouchable.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

Thomas Jefferson's estate is home to hundreds of varieties of historic fruits and vegetables.

A massive, majestic mammal watches over pedestrians from his perch atop a former B.P.O.E. lodge.

Under a playground is a little-known sealed train tunnel that likely contains the bodies of workers trapped by cave-ins.

The narrowest house in America is seven feet of pure spite.

This colonial tavern played host to George Washington, Thomas Jefferson, and other famous early Americans.

A superbly preserved example of Georgian residential architecture that was once home to one of the founders of Alexandria, Virginia.

This small pedestal marks the spot of the first lot of land sold in Alexandria, Virginia in 1749.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

A former major munitions plant that has been converted into a sprawling art space.

An original apothecary from 1792.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

Twelve grave-faced marble angels guard the emperor's tomb at Les Invalides.

This massive library holds what was once the largest book collection in the world.

A stunning mosque owes its design to an Ottoman ruler nicknamed "the Butcher."

The tallest waterfall in the Judean Desert is named for its connection to a biblical figure.

A "miracle" that seems to produce more holy fistfights than holy revelations.

The home of the Dead Sea Scrolls is an abstract modernist dream.

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

The bluer than blue waters in these natural Israeli caves are reached via the world's steepest cable car.

A quick journey through the history of Annapolis.

One artist’s scheme to expand museum viewing hours into the evening led to the illumination of an entire city.