Bioluminescence in the reefs of the Maldives causes the sea to glow like a starry night sky.

One of the best examples of Art Deco architecture in the United States.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

All of Chicago's wood-paved streets are long gone but two alleys remain.

A terrific purveyor of natural history objects and curios.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

North Korea's massive "hotel of doom."

Eccentric concrete mansion and museum designed and built by hand from the inside out.

A botanically themed auditorium blooms within the world’s last operating double-decker theater.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

Hundreds of glow-in-the-dark objects light up a museum in a historic zinc mine.

Leaf through over 30,000 artists' sketchbooks in what may be the world's largest collection of doodles

Fittingly, America's museum of architecture is itself a magnificently designed old building.

A grandiose octagonal home crowned by a large dome stands out among the antebellum mansions.

Recognized the world over as the home of the McCallisters in the 1990 movie "Home Alone."

A towering Art Deco movie palace made to look like a Mayan temple.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

A remarkable medieval structure born from a 14th-century disaster.

A gothic church spire sits atop this skyscraper, the tallest church in the world.

It took 160 years to complete the most ornate church in Ecuador.

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

More gold than anywhere else, ever.

Inside the unassuming cemetery chapel is a magnificent stained glass window and mosaics.

Despite its lavish ornamentation, and wholesome lifestyle of its devotees, this mountain commune has faced its share of issues.