The ruins of the first Spanish settlement in Puerto Rico.

This nearly abandoned "company town" is a ghost of Puerto Rico's once-lucrative sugar industry.

This small primate research island is teeming with playing, fighting wild monkeys.

On a clear day, you can see all the way to the Virgin Islands from the top of this observation tower built in the 1960s.

A magnificent waterfall nestled in the heart of the El Yunque National Forest.

This tiny home was originally a narrow alleyway.

At this studio, musicians, engineers, and quite possibly a music-loving ghost carry on Puerto Rico's musical traditions.

Legend tells how a Spanish soldier disappeared from this isolated sentry box without a trace.

This departure gate in Austin's airport sends travelers to over 120 imaginary destinations.

A mythical chimera first sculpted in 1936 as a mix of the main animals of Texas livestock.

A "Texanic" (gigantic Texas) collection of Art Deco architecture at Dallas' historic Fair Park.

One nutty businessman’s unique tribute to an ancient tool.

The saga of the massive nut begins and ends in Texas.

According to legend, you must remain completely silent while passing this man-made mound or suffer the consequences.

Boats and fish both find their way through this massive hydroelectric structure.

World's largest porcine hairball sits in a collection maintained by Benedictine monks.

A tribute to a great Texas blues musician.

The face of a woman pushes its way through the earth.

Historical figures from New York City's Catholic community reside in Midtown.

A memorial to the first person killed by a motor vehicle in the Western Hemisphere.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

This impressive scene portrays the elusive forest giraffe of Central Africa.

This magnificent herd of stampeding elephants has been frozen in time for over a century.

This morbid scene depicts the Darwinian drama of death on the African savannah.