The bluer than blue waters in these natural Israeli caves are reached via the world's steepest cable car.

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

The dairy farm in upstate New York where nearly half a million people gathered for three days of peace and music in 1969.

Oldest existing wire suspension bridge in the United States.

A winding, cliffside stretch of road overlooking the Delaware River.

One of the U.S. Forest Service's only mansions is outfitted with a dinner table for floating food.

The site of Paul Revere's historic two lantern warning.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

Millions of numbers carved in glass represent the tattoos forced upon victims.