This narrow coastline trail through the dense Kauai wilderness is among the most beautiful and dangerous in the world.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

If you don't look closely, you might mistake this sculpture for just another passenger waiting at the airport.

The romance of early commercial flight still fills this Art Deco destination.

This building was once the most magnificent mansion in Nafplio.

The location where the famed author and abolitionist began his journey to freedom.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

This private residence was the template for one of the most beloved television homes of all time.

This redwood is a historic landmark, a town’s namesake, and the dancing sideline symbol of Stanford University.

One of the oldest active carousels in the country—but it might be missed by all but the keenest-eyed boardwalk strollers.

Hidden within an idyllic suburban garden is a memorial dedicated to the victims of a terrifying spree of killings committed on U.S. soil.

The longest escalator in the Western Hemisphere takes over three minutes to ride down.

The tallest The Church of Jesus Christ of Latter-day Saints temple in the world soars above the Beltway.

FDR's Art Deco hospital tower was hopelessly inefficient.

This propitious plastic porcine has been petitioning park visitors to pick up after themselves for more than 50 years.

Hundreds of thousands of ancient documents offer a unique glimpse into Jewish life in Cairo.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

Scattered throughout London are ancient remnants of the city's former bounding wall.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

Golden Gate Park's historic collection of plants.

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

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

This slumbering beast honors the Bavarian soldiers who died in Greece during a 19th-century typhoid outbreak.