An enormous, inside-out glass globe built in 1935.

This award-winning men's bathroom was just too beautiful to not allow women to see.

Yo, Adrian!

A tour de force of a fountain, memorializing a man who loved fountains more than anything else.

This elaborate towering structure was once famed for its revolutionary height.

The sounds of the world's largest fully functioning pipe organ dazzle shoppers at a Philadelphia Macy's.

Don't get it twisted: This is the oldest pretzel bakery in the United States.

This might just be the TARDIS of bookstores.

The only surviving building of historic West Boylston, which was flooded to create the Wachusett Reservoir.

The first American department store, and home to the largest operating musical instrument in the world.

These lush botanical gardens employ the most purrfect pest control force.

These tourist trap caverns are said to be the former home of a legendary Pennsylvania Hermit.

Every equinox this Maya pyramid puts on a spooky ancient light show.

A 30-foot stack of piano keys memorializes one of the greatest keys players in jazz history.

A bit of retro transportation flair preserved in the world's largest department store.

The oldest continuously occupied public building in the United States.

A local prank turned town icon.

In a city crazy for seashells this museum educates and amazes visitors using the wonder of cast-off exoskeletons.

This magnificent castle grew from a small Moorish fortress, and reportedly inspired two iconic Disney castles.

This lone tree and dramatic sandstone outcropping are so beloved by Michiganders they can be found on one of the state’s coins.

A lush indoor jungle fills this bustling Madrid transportation hub.

This extraordinary Depression-era expenditure was modeled after a postcard of a Mediterranean hotel.

This cave holds a surprisingly colorful variety of geological oddities.

A building so large that it has its own weather.