In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

This forgotten Frank Lloyd Wright house is an architectural marvel at the end of a sleepy residential street.

In a city filled with Frank Gehry buildings, one stands out as one of the architect's weirder works.

A ghost town at the airport is now a refuge for blue butterflies.

Rainbow-hued local gem in Venice.

A library of rare occult books in Los Angeles.

Nature and art meet in this curvy creation

This library and museum is dedicated to the life and literature of the Indianapolis native author.

This semi-spooky remnant of an abandoned hotel provides fantastic views.

America's smallest national park site is the former residence of exiled Polish national hero Thaddeus Kosciuszko.

This public park was the site of the largest civilian disaster of the Civil War.

Journey through a collection of over 35,000 Halloween items from all generations.

The first American axe throwing club.

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

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

This Philly landmark has a giant butterfly pavilion, three floors of insect displays, and withstood a $40,000 heist.

This stone tower marks a lookout point over the historic Washington Crossing, and maybe some buried treasure.

In the bowels of a 19th-century brewery lurks a fine-dining restaurant offering an array of themed feasts.

This Pennsylvania cave holds evidence of the oldest known inhabitants of North America.

An outlandish shoe shaped house built by an eccentric millionaire.

A quiet, gothic haven nestled between Pittsburgh's Squirrel Hill and Point Breeze neighborhoods.

This little-known Revolutionary War fort is supposedly haunted by the ghosts of its past.

This hidden gem of a garden has one of the only surviving Victorian ferneries in America.

When the Austin Dam failed it destroyed much of Austin...and then it failed again.