Mariners once used this prehistoric landfill as a navigational landmark.

This natural wonderland is a unique chance to explore a Carolina bay, a mysterious geological formation of unknown origin.

The tallest The Church of Jesus Christ of Latter-day Saints temple in the world soars above the Beltway.

The longest escalator in the Western Hemisphere takes over three minutes to ride down.

The ruins of this long-abandoned unsuccessful gold mine can still be found.

The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

Before Nixon, "watergate" meant canals.

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

She stares out across six lanes of traffic, clutching a musket and infant with determination.

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

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

The uniquely-designed winter home and sculpture studio of Anna and Archer Huntington.

The language and heritage of a nearly forgotten culture can still be explored in this Southern enclave.

Twenty-eight years after this local landmark was washed ashore by hurricane Hugo, it was washed away by hurricane Irma.

A pink and gray pair of pachyderms advertise a fireworks shop.

I-95's Tijuana-style celebration of kitsch at the Carolina border.

This bare tree might not have leaves but it is constantly clothed in festive decorations left by mysterious local benefactors.

Practice your Dirty Dancing lifts in the manmade lake where Johnny Castle himself did.

One of the oldest living oak trees in the Southeast.

This recently rediscovered Civil War-era submarine was the first to ever sink an enemy ship.

The record holder for the world’s largest peach.

Amazing pre-Civil War ruins alongside a shallow, rocky river that hosts beautiful (but endangered) lilies.

This set of rickety spaceships are prepared to give alien travelers a place to relax and go to the bathroom.

The world's largest fire hydrant is supposedly tornado-proof.