Restaurant in Northern Wisconsin comes with a unique feature: a grassy roof covered in living goats.

A bizarre house filled with an astounding array of collections.

A sliver of nostalgia in Seattle's Viretta Park.

A wall of chewing gum moonlights as collective art.

A museum dedicated to the history and exploration of both popular music and science fiction.

Around half a million years ago, these magnificent columnar basalt cliffs were formed from cooling lava.

Miraculous tree that seems to sprout out of solid rock.

One of the smallest towns in the United States.

The only natural lake in the world that drains into both the Atlantic and Pacific Oceans.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

The first declared National Monument in the United States.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

The romance of early commercial flight still fills this Art Deco destination.

The controversial urban planner who designed Washington, D.C., was buried in Maryland, and can presently be found in Virginia.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

A former major munitions plant that has been converted into a sprawling art space.

The graveyard holding the remains of George Washington's slaves was forgotten for nearly 200 years.

This colonial tavern played host to George Washington, Thomas Jefferson, and other famous early Americans.

This stately building in Alexandria, Virginia was built by Freemasons to honor one of their most famous members.

A hidden church in a hidden courtyard tells the story of the Miracle of Amsterdam.

Europe's official "zero-level," the equator of elevation.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.