This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

Cavernous opening completely encased in Karst limestone.

The world's largest military aircraft cemetery.

A walk through the historic city center, under the streets of Seattle.

A museum dedicated to the history and exploration of both popular music and science fiction.

A 100-year-old purveyor of curiosities, curios, and kitsch featuring mummies, shrunken heads, and a Fiji Mermaid.

San Diego's most historic and haunted home.

Welcome to old Florida, where a 1940s mermaid show is still enchanting visitors.

Electrical pylon in the shape of Disney's beloved mouse.

The site of a gold-digging conquistador's bloody landing in the Americas.

A Circus legend leaves an unexpected endowment.