The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

An enigmatic concrete structure in a lakeside Toronto park raises more questions than answers.

The giant birds honor two native North American species.

A unique subway station where pillars evoke ancient civilizations.

L. Frank Baum wrote part of the "Wizard of Oz" series in this wooden Victorian beach resort.

Overlooking the Colorado Convention Center is this giant sculpture made from thousands of triangles.

Dedicated to one of the darkest moments in Irish history.

Statue commemorating the use of ether in anesthesia.

A men’s restroom became a sandwich shop.

The sign that drew attention to a young boy's cucumber stand is now the name of his fruit superstore.

Found: Garden of Eden in Miami-Dade County, Florida.

An icon among Florida's pre-Disney tourist attractions, just west of Orlando.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

Over 120,000 curious objects that have shaped our modern world.

Meet manatees face-to-face at this zoo for native species.

Where monkeys run wild and the humans are caged.

An abandoned water sports stadium that has become a haven for graffiti and decay.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

A luxurious 1880s hotel with its fair share of Tiffany stained glass, Edison electricity, and of course, ghosts.

Welcome to old Florida, where a 1940s mermaid show is still enchanting visitors.

Visitors to this library are in for a real-world education in modernist architecture.

Built for an exposition in 1915, these horticultural displays have stood the test of time.

A sculpture of the famous photograph stands on San Diego's "Greatest Generation Walk."

These constructed wetlands naturally filter millions of gallons of treated wastewater every day.