This cannonball embedded in the side of an Edinburgh house once served a surprisingly pedestrian purpose.

There aren't too many operational funiculars around, but Pittsburgh has two!

A local prank turned town icon.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

Tiny effigies of the victims of Edinburgh's famous Anatomy Murders.

A remarkable feat of Victorian engineering across the Firth of Forth.

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

A restored Pittsburgh house of God has been converted to a marvelous house of suds.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

This permanent exhibition celebrates the finest of our heartless automatons both real and fictional.

The souvenir got the company’s founder out of a pretty pickle at the World’s Fair.

A small granite block at this monument's base is the only part of Lincoln's Tomb outside of Illinois.

Sail through this subterranean show cave that is home to a legend that would go on to name nearly everything around it.

This abandoned iron furnace was one of the first to use coke—a type of high-carbon fuel—to make iron.

When the Austin Dam failed it destroyed much of Austin...and then it failed again.

Inside the Wayne County airport is an amazing collection of lights and sounds.

Don't get it twisted: This is the oldest pretzel bakery in the United States.

A small town garden is dedicated to a psychic dog with the most soulful eyes.

People from around the world visit the shrine of Japan’s legendarily loyal dog.

A memorial to the only dog ever officially enlisted in the Royal Navy.

This sculpture may be the only known depiction of a man who helped finance the American Revolution and inadvertently created the dollar sign.

This hulking behemoth is actually five interconnected towers built in the 1960s.

A magnificent waterfall is also home to the remains of a Roman hydraulic engineering system.

An abandoned jewel of a ballroom on the top floor of Australia’s busiest rail station echoes with the sounds of a bygone era.