This public park was the site of the largest civilian disaster of the Civil War.

Once used to screen films for theater owners to rent, this historic building is now a start up hub.

A model of a dinosaur that was named for Andrew Carnegie stands outside the museum that also bears his name.

Hundreds of protractors affixed to surfaces all over the city.

Despite being stolen multiple times, this civic electrician's street corner Snoopy won't be stopped.

The only way to see Pittsburgh is from the top of this lookout point, just like the ancient members of the native peoples did.

One of the steepest streets in the United States makes an intriguing challenge for cyclists.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

The upstairs reading room is packed with millions of rare books, literary manuscripts, and historical treasures.

A tribute to the "toughest woman on the Texas frontier," who survived a famous battle and five husbands.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

The largest of London's subterranean rivers and once a mad, bad center of London life.

The taxidermied remains of a once-great parrot.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

Bronze sculpture celebrating the relationship between Churchill and Roosevelt.

Hidden beneath the streets of London is a secret subway that only carried mail.

The little bear in the "funny kind of hat" has made his way from London back to Peru.

This stone complex marks the urban center of a lost civilization.

Now containing the bones of the actual conquistador, instead of someone else.

If you’ve ever seen a picture of Machu Picchu, then you’ve seen a picture of Huayna Picchu—you just didn’t realize it.

The large collection of pre-Columbian pottery might make you blush.

Preserved Inca city and site of the last Inca stronghold against the Spanish conquistadors.