Native Australian lizards inhabit this garden celebrating Sydney and its sister city in China.

Russian history in San Francisco.

Staircase winds down the side of Telegraph Hill through gardens, wild parrots flying overhead.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

This “living museum” at UCLA exhibits thousands of plant species from all over the world.

This opulent hotel has been visited by Spider-Man, Charlie's Angels, and the Ghostbusters.

An amazing collection of model trains, collectibles, and artifacts that span the last 100 years.

These free-roaming horses were once destined to disappear from the land.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

Within the former ghost town of Cisco is a carefully restored tiny town with one resident and its own art residency.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

This concert pavilion on the shore of the Great Salt Lake has been destroyed by fire, water, and disinterest but keeps coming back.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

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

The land is home to swimming ponies and a legendary 18th-century treasure.

This abandoned asylum was once a state of the art facility before devolving into one of the most deadly mental institutions in American history.

Enchanting gardens surround a derelict mansion, all hidden in plain sight behind a stone wall.

This hospital fell into ruins after failing to act as the advocate for the mentally ill it was designed to be.

This Great Depression-era creation was once known as the strangest house in the world.

A recently abandoned psych ward at the end of Sanatorium Road.