See massive fossils that are over 200 million years old in northeastern Arizona.

The unusual patterns in this rock formation result from two distinct modes of weathering.

A tunnel with windows, so you don't miss out on the impressive views.

A late-19th century diversion canal built by hand crosses Bryce Canyon National Park and is still in use.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

A Norwegian-born sculptor created these soaring guardian angels at the entrance to Hoover Dam.

These markers are used to document elevation changes around the famed dam.

One of the world's oldest and most massive living organisms is a grove of quaking aspens.

The penultimate and final resting places of British General Edward Braddock—minus a few bits and pieces.

This seemingly out-of-place gas station by the Watergate hotel was once described as the most expensive gas station in the world.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

An overlooked memorial honoring the local Washington residents who died in World War I.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

The only place for a truly presidential dram.

This twice-relocated "Usonian" home is among the smallest built by master architect Frank Lloyd Wright.

This lovely picnic spot featuring thunderous jet landings is an aircraft spotter’s dream.

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

The narrowest house in America is seven feet of pure spite.

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

The only remaining African American schoolhouse in northern Virginia is now a museum dedicated to formerly enslaved people.

This dilapidated ship carcass covered in trees is a striking sight.

This monument remembers the first Japanese Americans forcibly relocated during World War II.

42nd story Pyramid shaped penthouse tops Seattle's oldest skyscraper.

Allowing humans and fish alike to migrate from freshwater to saltwater and back again.