Lincoln Memorial opening underground museum exhibit

WASHINGTON (WPVI) -- People interested in getting a unique view of the Lincoln Memorial can start reserving tickets.

The National Park Service will start offering tickets on Tuesday to the new Undercroft Experience.

The free exhibit is located underneath the structure.

It's a cavernous chamber where you can see the grid of concrete columns that support the memorial.

The Lincoln Memorial Undercroft exhibit is 15,000 square feet.

It opens on June 25.