An ancient tunnel in Jerusalem built to redirect water in the event of a siege is one of history’s great architectural innovations.

This historic hotel invented the chocolate brownie.

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

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

A once-booming Mississippi River town with a history of racial violence is now eerie and mostly abandoned.

This midcentury chapel is a bold architectural statement and a symbol of Indiana's Lutheran heritage.

This Yellowstone geyser may not shoot as high as the nearby Old Faithful, but it erupts for considerably longer.

South Dakota's oldest operating brewery is housed inside a historic firehouse.

This 13-foot smiling peanut in Georgia helped Jimmy Carter win the 1976 presidential election.

This hidden stream beneath Indianapolis makes an appearance in the best-selling novel "Underground Airlines."

Yo, Adrian!

The world’s largest truck stop includes a barber shop, chiropractor, and a huge museum with antique trucks.

A tiny wilderness cemetery commemorates the deadliest episode of the Klondike Gold Rush.

It took 275 years and four burials to finally put the Mayflower’s most famous passenger to rest.

A popular place to pick up prehistoric coral fossils from the time when Michigan was an ocean.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

Swedish skyscraper with a 90° twist.

This chimerical bridge/tunnel appears to dead end right into the sea.

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

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

Opulence and fantasy collide in this royal chair which is supposedly made with unicorn horns.

The old observatory in Copenhagen has a spiral corridor used as a racetrack.

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.