13 most incredible eggs of all time

The great elephant bird of Madagascar, now extinct, laid an egg almost 400 years ago that's, remarkably, still intact. More than a foot tall and 27.5 inches around, the rare artifact sold for $53,125 in 2012.

Chocolate Kinder eggs are a treat for German kids, but they're illegal in the U.S. The reason? The non-edible toy hidden inside is considered a choking hazard. U.S. Customs and Border Protection agents warn that each egg carries a $2,500 fine if caught smuggling them into the US.

Set to be India's most expensive office building, the 13-story, solar-paneled Egg of Mumbai (under construction now) will have elevated gardens and wind turbines to generate the building's electricity.

Fabergé produced the most expensive jeweled enamel egg in 1902—it was purchased for $17.4 million in December 2007. Originally created for the Rothschilds, a European banking family, the piece doubles as a clock—which also makes it the most expensive timepiece ever sold.

Artist Beth Ann Magnuson creates these Victorian Lace Eggs using a super-fine high speed drill—and a steady hand. After drawing a pattern onto the shell with a pencil, she oh so carefully hand carves the delicate shells. Prices start at $19 each.

William Curley, a chocolatier based in London, created the most expensive non-jeweled edible chocolate egg to sell at an auction. A technology investor purchased the 110-pound Golden Speckled Egg for $10,000.

Paleontologists have identified the oldest known dinosaur eggs—34 of them in fact—belonging to the species Massospondylus, which lived over 190 million years ago. Some still contain well-preserved embryos and were unearthed in South Africa in 2012.

The Pysanka Museum in the Ukraine is the largest egg-shaped museum in the world. It's entirely dedicated to the egg painting process, called Pysanka, a traditional decorating method that is similar to batik.

Meanwhile, the world's largest Pysanka clucks in at 25.7 feet wide, 18.3 feet high and weighs 5,000 pounds. Made of aluminum and located in Vegreville, Canada, the egg sculpture is a memorial to the area's early Ukrainian settlers.

The National Center for Performing Arts in Beijing, known as The Giant Egg, was designed in front of a lake so the reflection of the water becomes a part of the design, making the egg appear whole.

Another performing arts venue, this one in Albany, is simply called The Egg. The space was built between 1966 and 1978 and is still considered a groundbreaking concept with its smooth, round exterior.

Located outside Barcelona, The Dalí Theatre and Museum, designed by Salvador Dalí, is the largest site dedicated to the artist's diverse work. Also worth noting: the giant eggs that rest on the roof.