Historical trolley restoration and operation at History San Jose, Kelly Park.

An abandoned relic of the city's failed experiment with below ground transit.

There are more than 4 million bricks inside this unofficial Lego museum in a former middle school.

Catacombs turned marketplace.

A take-out restaurant that only serves cuisine from countries with which the United States is in conflict.

The Bucyrus-Erie model 1850B electric shovel, or "Big Brutus," the largest existing electric shovel in the world.

360° views of the city plus five floors of optical illusions and hands-on science.

A celebration of once forgotten materials.

Eyam took steps to quarantine themselves and keep the plague from spreading.

The National Railway Museum in York is the largest railway museum in the world, attracting almost 1 million visitors per year.

The old Niles Canyon Aqueduct in the San Francisco Bay Area is a bemusing and secret trail through nature for wayward travelers.

Michael Heizer's masterwork in the Nevada Basin.

Collective dedicated to restoring steam engines.

The world's smallest movie theater runs on solar power—an attraction in itself.

The sign at the garden gate reads: "These Plants Can Kill."

This quaint archive of the silent era preserves and pays homage to a seminal moment in film history.

Condemned US Navy seaplane control tower turned officers’ club sits atop Yerba Buena Island.

One of the last few places in Manhattan that employed a pneumatic systemic keeps it on display.

Amazing and mysterious Neolithic settlement on Scotland's Orkney Islands.

The world's largest rotating world.

Dive bar built out of the remains of a whaling ship.

Commemorating the spot where the famous scientist fed his pigeons.

No Gordon Lightfoot song, only a barebones monument to greed.

Below a historic English market town lies a secret underground city complete with kitchens, laundries, storerooms, and an underground lake.