The only thing better than tubing down New Jersey's scenic Delaware River is doing so while eating a hot dog from a giant floating stand.

These numerous Israeli caves were dug out over hundreds years for reasons ranging from hideouts to burial sites.

A tiny, unmarked beer and whiskey bar above an Ethiopian restaurant in West Philly fails to conceal live bluegrass.

Mural made of 100,000 pieces of hand blown glass, and until recently, the largest glass mural in the US.

Each of these gorgeous, intricately decorated rooms is painstakingly crafted to the scale of 1 inch: 1 foot.

Nonprofit art center that promotes outsider, intuitive, and self-taught art.

A Bibliophile's Dream.

This whimsical Oz-themed park had a wonderful impact on the surrounding neighborhood.

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

The only castle in North America to ever house European sovereigns.

The oldest surviving botanic garden in the United States.

A world-class collection of mechanical musical instruments and automata.

Destructive children, start your engines.

The city is full of whimsical portals to another world.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

Cheap art and political theater in Vermont.

You can row a boat through this ancient underground reservoir.

The home of the Dead Sea Scrolls is an abstract modernist dream.

The bluer than blue waters in these natural Israeli caves are reached via the world's steepest cable car.

Mysterious rocks that ring musically when struck.

Hundreds of glow-in-the-dark objects light up a museum in a historic zinc mine.

The house that Frank Lloyd Wright "(shook) out of his sleeve at will" at the age of 86.

Dr Barnes' $25 billion private collection of art and arboretum.

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.