Surrounded by industrial sprawl, a small monument marks the site of William Penn's first landing in Pennsylvania.

Memorial built in 1922 in remembrance of WWI casualties.

The highest point in New Jersey is marked by a massive, if simply named, obelisk.

Venture into the past with an unlisted exhibit hall featuring extinct birds.

Nine of the very few concrete ships ever made in the U.S. are beautifully decaying off a Virginia pier.

Family-run for more than a century, this pizzeria makes a unique mustard pie.

Beautiful views of the surrounding hills and birds of prey can be found at this sanctuary.

The site of the daring river crossing that changed the course of the American Revolution.

This advertisement for talcum powder was painted on the rock face and has since defied removal.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

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

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

Down the road from where the Wright brothers lifted off is another flight tribute practically hidden from sight in the woods.

This futuristic bridge is one of the longest self-anchored pedestrian bridges in the world.

Quite simply the largest tree in the world (by volume).

This natural spring is the winter home to the largest gathering of manatees in the world.

Trace the history of the nation’s early days at the site of America’s oldest stock exchange.

A bronze monument to the infamous radio broadcast in the real New Jersey town where the fictional Martians crash-landed.

This Hindu temple in suburban New Jersey is the largest in the United States and one of the largest in the world.

One of the oldest suspension bridges in the world blends in perfectly with a medieval castle.

Burial grounds for more than 1,000 bodies deep under the modern town of Rabat.

This Stone Age solar temple aligns with the sun on each equinox and solstice.

This church is named for one of the most dramatic tales in the early Christian church.

The floor of this spectacular Baroque sanctuary is covered in memento mori.