Mysterious 500-year-old tapestries depict a unicorn hunt.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

Avoid gangster interaction while window-shopping.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Copenhagen's celebrated theme park and gardens.

This daunting 1st century fortress was purportedly the site of one of the most dramatic revolts of the Jewish-Roman wars.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

The medieval prince founded the first library in Ukraine at Saint Sophia's Cathedral where he was interred.

Right next to departures—how convenient!

The romance of early commercial flight still fills this Art Deco destination.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

Formerly the most gerrymandered district in the U.S., it twisted and turned along racial borders.

The U.S. Supreme Court's secret Cold War relocation facility in the mountains of North Carolina.

This shifting North Carolina sand dune is an odd little desert surrounded by oceanic forest life.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

The house that Frank Lloyd Wright "(shook) out of his sleeve at will" at the age of 86.

Frank Lloyd Wright’s most iconic home dangles over a Pennsylvania waterfall.

The air force base preserves its scars from the Japanese attack on Pearl Harbor.

Teeming with illegal goods and services, this towering maze of vice is also a popular tourist accommodation.

This elaborate towering structure was once famed for its revolutionary height.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

The ruins on a deserted tropical island in the Philippines bear the scars of WWII.

Iron Butterfly's personal collection of footwear.

Old Danish castle immortalized in Shakespeare's Hamlet.