This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

The walls of the iconic dome are hollow and have a secret stairway.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

A swing to dangle you off the very edge.

The oldest bibliophilia club in America, with exhibitions on historic books and graphic arts.

A priceless collection of the Nation's cryptologic history.

Where dogs like the rare "Fire-Tailed Border Cocker" run free on the mountainside.

Where manatees are the snowbird vacationers in these balmy Florida springs.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.