This cave holds a surprisingly colorful variety of geological oddities.

More than 5,000 contemporary and "historic" mustards from around the world.

Prayers and messages of hope decorate the ceramic tiles of this pavilion.

Three playfully immersive mini golf courses let you travel alongside your ball to the cup at this facility, which has been around since the 1950s.

Comprised of Spanish war cannons, this sculpture once graced the bow of a WWI warship.

Stone markers on the campus of Gallaudet University commemorate a peculiar school tradition.