Order scoops of pandan, lychee, and black sesame at this family-run institution.

Enormous lake at the bottom of a unique cave system.

Stroll through a wonderland of stupendous moss-covered trees.

Get lost in this haunting fairytale art walk through a man-made eucalyptus grove.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

This shop for all your super spy needs hides an educational secret.

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

Giant Redwood-themed cafeteria operates under the golden rule, "Dine Free Unless Delighted."

Continuing the tradition of the dime museum in style.

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

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

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

A collection of oddities including Dr. Kevorkian's suicide device, the Thanatron.

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

A tiny theater hidden in an alley plays a constant stream of short silent films for anyone willing to peer through the peephole.

This morbid, delightful curiosity shop offers everything from animal bones to human teeth.

Shop selling 500 flavors of soda has something for everyone.

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

A toxic ghost town sitting atop a massive coal fire.

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

A semi-scholarly approach to sex.

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

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

The United States Capitol's former columns still stand.