These medieval funerary monuments are now home to a colony of critically endangered vultures.

This museum is dedicated to the most famous Irish writers in history.

Its tremendous toad is actually a five-story museum and viewing platform.

Hundreds of skulls and bones at the largest skeleton museum in the country.

Beautiful mosaics cover the first stations opened on New York City's newest subway line.

One kilometer of thick brass rod laid out before your eyes.

The original toys that inspired the beloved children's stories are on display at the New York Public Library.

Cryptic messages embedded in the New York City sidewalk.

Reverend Jen's unique museum/living room showcases her troll collection.

A masterpiece of LGBT art has been restored in what may now be the most valuable restroom in America.

A quirky collection of figurines backdropped by city views is hidden next to a popular restaurant in the Hollywood hills.

America's most famous piece of self-built architecture.

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

It should come as no surprise that the best view of the Hollywood sign is from Batman's lair.

During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.

Remants of foundations, streets, and streetcar tracks inhabit the cliffs where a landslide occurred in 1929.

The abandoned zoo enclosures offer a perfect place to experience the other side of the bars.

The art and history of the velvet painting are on full display in this Los Angeles museum.

Historic house-museum dedicated to the revolutionary gay graphic artist Tom of Finland.

See the rare bloom of the "Queen of the Night" cactus at one of the world's largest succulent collections.

These ancient sunken lanes were naturally tunneled into the soft ground by countless footsteps.

A common entry point to the Griffith Observatory trail holds its own wonders.

Iran's colorful terraces are a rare geological masterpiece.

This abandoned caretaker's apartment is one of 13 left in the New York Public Library system.