Venue for strange sideshow displays and musical acts.

The inspiration for H.P. Lovecraft's horror stories and Batman's Arkham Asylum is now a condominium complex.

A Pythagorean funhouse that tries, successfully, to prove that math is the coolest thing ever.

Enormous lake at the bottom of a unique cave system.

There is no trying to fall in love with this Star Wars fountain, you just do or do not.

This lower Manhattan bar is set up in an old bank vault that rests beneath a skyscraper that hides even more historic splendor.

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

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

Eighteen miniature death-scene dioramas.

Stroll through a wonderland of stupendous moss-covered trees.

A hand-built folk art installation covered with messages of God's love.

A semi-scholarly approach to sex.

A 200-year-old bar in the historic French Quarter refuses to give up its place in history, nor its role in securing ours.

The seamy, underground secrets of Portland's criminal past.

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

James Turrell's total color immersion art installation, hidden on the top floor of a luxury handbag shop.

The final resting place of New Orleans' most famous voodoo priestess.

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

The United States Capitol's former columns still stand.

A winding path built in secret on the edge of the continent.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

A toxic ghost town sitting atop a massive coal fire.

The rocks in this arid basin leave trails of movement behind them.

Resting place of Hollywood's immortals is also site of summer film screenings.