During the holidays, a vintage subway train whisks New Yorkers back in time.

A band of aerialists and circus performers putting on incredible shows in East Williamsburg.

One of the last Jazz Age "Wonder Theaters" in New York City.

A very classy 1920s-era bar right in Grand Central Station.

A New York garbage depot holds a secret collection of weird and wonderful refuse.

A hands-on traveling collection of the innovative devices of yesteryear.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

The ancient tomb acts as a calendar that keeps perfect time.

This floating garden in the sky is straight out of a fairy tale, but the real thing is nothing short of magical.

A tiny microvalley etched into the side of Knocknarea Mountain hides another world.

This Irish show cave is said to have been the site of a Viking massacre that claimed 1,000 lives.

An Irish church where an 800-year-old mummy is reaching out of his coffin as if to shake hands.

Perfectly preserved ancient monastery in an impossibly dramatic location on a rocky island in the Atlantic.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

Temporary Burning Man sculpture made of two 18-wheelers.

A collection of haunted objects and macabre oddities under one roof.

Wayne Newton's sprawling estate is now open for visitors to catch a glimpse of his "heart and soul."

A giant open-air sculpture made of over 200 full-sized boats.

The second-largest gold nugget in existence, displayed in a Las Vegas casino conveniently named the Golden Nugget.

A piece of the iconic wall found an unlikely new home in a Vegas bathroom.

Originally built as a promotional giveaway, this suburban house was designed to be an IRL version of the Simpson home.

One of the world's tallest Ferris wheels takes visitors high above Las Vegas in a spinning party room.

These banned cigarette vending machines now sell little pieces of pocket-sized art.