The vast, legendary catacombs hold secrets much stranger than stacked bones.

Amidst medieval and baroque buildings, five human-sized gherkins stand tall.

A mud statue stands in the dark tunnels, seeming to hold up the weight of the city above.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

Two stone columns flank the grand Venice square, but there were supposed to be three.

Go inside to really appreciate this 500-year-old technological masterpiece.

The famous polar explorer stands outside the Royal Geographical Society's headquarters.

The first declared National Monument in the United States.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

A Swedenborgian glass church surrounded by redwoods sits perched atop a massive landslide area.

A carousel trades in its classic horses and calliope for endangered species, native flora and fauna, and a modern soundtrack.

An Italian hillside ghost town.

An ethereal glowing blue ocean cave in Croatia.

A wonderfully strange collection of 500+ stuffed frogs doing people things.

Southern Italy's spinning top village.

Macabre symbols of death and mummies on display set the tone of this Italian purgatory church.

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

World-famous, Pink's still manages to keep its prized cult fetish status.

The private clubhouse for the members of the Academy of Magical Arts.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

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

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

High on a hill overlooking Los Angeles lives a world famous, high-power conical Tesla Coil.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.