Copenhagen's celebrated theme park and gardens.

The garage at the childhood home of Steve Jobs was a hangout for the founders of Apple, even if they never built computers there.

A house built from trash known as the poor man's Hearst Castle.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

A fascinating insight into daily life in the Eastern Bloc.

From toys to kettles to scientific instruments, this German museum celebrates the beauty of 20th century design.

A monument to the man who almost killed Hitler.

A brush maker used his factory to protect blind Jews from the Gestapo.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

Resting place of Hollywood's immortals is also site of summer film screenings.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

Elevated freight railway turned wildly successful urban park.

Try not to get slimed in Tribeca.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

The legendary building that needed ghostly approval before being built.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

World's largest collection of serial killer artwork and other macabre exhibits.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

Non-profit time travel mart sells goods you would need for a trip through the fourth dimension.

A beach made of semi-precious green sand on the Big Island of Hawai'i.

Watch the newest land on the planet form before your eyes.

This black shoreline is made up of exploded lava particles.

Hide from the tourist hordes in these relatively unknown, and unguarded lava caves.