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

Read a book next to a Midtown waterfall.

A hidden "place of interment for gentlemen."

Hundreds of secret cabinets built into the walls of legendary poisoner's private work room.

A secretive collection featuring objects that were designed specifically for U.S. intelligence operations.

A hyper-luxurious, 12,000- square foot home might be buried beneath Queens, still waiting to protect you from nuclear missiles.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

19th century cemetery hidden in Brooklyn's Prospect Park.

The largest medical and anatomical collection in France lies hidden from the public.

A lovers' beach, tucked below the surface of the island, provides a safe haven for romance.

A time-capsule monument reminding future generations of the importance of efficient and effective use of natural resources.

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

The top of a giant mesa, just outside of Amarillo, appears to float in the sky above.

The highest point in Oklahoma used to be a lawless outlaw's paradise.

The highest point in South Dakota contains the ashes of Valentine McGillycuudy, the "Holy White Man."

The modern birthplace of Irish freedom.

More sculpture than building, this architecturally significant temple was built on the spot of Saint Peter's crucifixion.

This replica stave church looks like a piece of Norway was simply plopped down in South Dakota.

Minimalist modern art on a repurposed military base in rural Texas.

A modern artist's primitive stone faces and unique rock instrument join Iceland's terrain with its history.

A sudden forest of traditional Papua New Guinean art works is hidden in a corner of Stanford University.

The oldest hall in Iceland was written of in the Sagas and features a centuries-old escape tunnel.

Outlaws, hot springs, and tragedy have all left their mark on this ancient road in the Icelandic highlands.

The oldest church in Iceland is one of the few to feature ornate decoration.