The souvenir got the company’s founder out of a pretty pickle at the World’s Fair.

Remants of foundations, streets, and streetcar tracks inhabit the cliffs where a landslide occurred in 1929.

This forgotten boat elevator was an engineering marvel in its heyday.

These recently uncovered walls are all that's left of Washington, D.C's first defense contractor.

Tiny horses tethered to antique rings are scattered around the city.

At one time this small mining village was the highest town in America but now it sits abandoned while the mine churns on.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

An antique narrow gauge railway line still running through the Colorado and New Mexico mountains.

The only National Monument ever to go missing for nearly 50 years then resurface in a dump.

A clone of a cloned tree that was so important it allegedly had its own guards.

This elaborate towering structure was once famed for its revolutionary height.

A super-sized promotional trick that is now a D.C. landmark.

The country's oldest continually-operated mini golf course lies hidden in plain sight, eclipsed by one of D.C.'s most popular tourist attractions.

The internal railway of one of the biggest steel plants in America has been transformed into a linear park with unique industrial views.

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

Three columns of volcanic rock shoot out of the ocean.

This stunning concert hall has become a symbol of Iceland's national recovery.

This tiny museum's sizable collection is jammed into a former underground public toilet.

An encyclopedic collection of mammal penises.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

Medicinal spa created from the mineral-rich runoff of a geothermal power plant

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

The U.S. Fish Commission’s effort to mass produce carp.

The bank that helped fund the Mexican-American War and the purchase of Alaska met its downfall after helping Augusto Pinochet launder money.