Those belting out show tunes might not realize this piano bar marks the site where Thomas Paine died in 1809.

The walls are decorated with whimsical murals painted by the creator of the Madeline franchise.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

The "Seinfeld" diner.

Ride the subways of yesteryear.

Just your average Marie Antoinette–themed speakeasy in an abandoned 19th-century subway tunnel.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

A Wisconsin kitsch palace from the 1930s lives its second life in 21st-century Brooklyn.

Tiki luxury on Nob Hill.

A psychedelic labyrinth on the San Francisco bay.

These molds for fiberglass statues have formed an eerie, accidental sculpture park.

This historic "City of the Dead" lies prominently in the center of New Orleans' famous Garden District.

This symbolic piece of New Orleans architecture is also home to a few ghastly stories.

Once defending the city of New Orleans from invasion by sea, this fort faces an uncertain future.

This bar named after the world's first mixed cocktail was home to one of New Orleans' most notorious politicians.

An otherworldly musical haven in The Big Easy.

By day this New Orleans square is for pedestrians, but by night it is a kingdom of kittens.

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

This "second" cemetery represents New Orleans' attempt to keep cholera at bay.

This float factory takes the mask off of Mardi Gras and lets visitors see where the magic happens.

The only rotating bar in New Orleans has been slowly spinning since 1949.

New Orleans' famous cemetery, located on the site of a former race track.

The restaurant keeps a hidden séance room on the second floor and reserves a table for the spirit of the former owner each night.