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

The Grand Canyon of Texas.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

A massive Montreal stadium that has seen nothing but trouble since its inception.

A grand Gothic Revival basilica with stained glass depictions of Montreal's religious history has only one soul resting in its crypt.

Designed by Buckminster Fuller, this relic of the 67 Expo survived fire and ice.

An underground mansion with fruit-bearing trees and grapes growing beneath the surface of central California.

An enormous pink granite batholith, long attributed with spiritual powers by the Tonkawa Indians.

The pit stop from "The Texas Chainsaw Massacre" now serves beef and pork barbecue, not people.

The 40-foot-tall votive candle is the largest of its kind.

This big empty pig is a nostalgic throwback to mid-20th-century Texas barbecue.

An abandoned, decaying sculpture garden built by an eccentric physician in the 1920s now looks more like a forgotten cemetery.

What was meant as an innocent piece of art has earned a reputation as the "mansplaining sculpture."

These boots are made for selfies.

The world's largest squirrel statue clutches a pecan bigger than your head.

A 24-hour vending machine restocked daily with homemade full-sized pecan pies.

A grove of colossal man-made flowers built to collect the sun's rays.

A former electrical substation is now home to an eccentric junk art masterpiece.

An exquisite grouping of structures made from 10 tons of invasive saplings.

Continuing the tradition of the dime museum in style.

This failed condo development was reborn as a street art hub.

Locals dubbed it the "Owl Building" because of its bird-like appearance.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

This unique structure in suburban Austin is made up entirely of other people's castaways, and constantly changing.