A monument to the three wars that led to German unification towers within a Berlin traffic circle.

A cannon designed to fire an atomic warhead.

The lowest point in the state of Illinois, at the confluence of the Mississippi and Ohio rivers.

The oldest restaurant in Portland serves fiery coffee cocktails and an astounding amount of turkey.

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

An ambitious developer built what was once the world's tallest fountain in a Phoenix suburb.

The 340-year-old house that inspired the classic Nathaniel Hawthorne novel.

A simple but powerful tribute to the 20 victims of the 1692 witch trials.

Experience the hysteria of a 17th century witch hunt through goofy reenactments and wax dummies that should probably be burned at the stake.

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

One of the indelible moments of the American Revolution took place at this location.

This statue intended for children to enjoy became a minor political spat.

Interactive museum complete with costumed re-enactors and the only known surviving chest from the Boston Tea Party.

A dedication plaque on this Boston tunnel is a microcosm of a massive, controversy-laden construction project.

This nearly 200-year-old restaurant's history includes an exiled French prince, JFK, and a very hungry Daniel Webster.

This headstone marks the grave of an 11-year-old boy killed during clashes in the streets over the boycotting of British goods.

This monument on Breed's Hill proves that one of the most famous battles of the Revolutionary War is misnamed.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

This futuristic airport terminal was abandoned for decades before reopening as a hotel—with a vintage plane of its own parked out back.

This castle-like building in Manhattan helped destigmatize cancer in the 19th century.

With a history dating back to Victorian times, this architectural gem is a rare New York tourist haunt worth visiting.

Captain America, Sub-Mariner, and the Human Torch were all born in this art deco Manhattan masterpiece.

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.

Featuring the the longest lift span of any vertical-lift bridge in the world.