A museum in the former home of Marxist revolutionary Leon Trotsky.

The famous artist couple lived and worked here, in two different houses separated by a bridge.

Frida Kahlo's childhood home, now a museum of her life and works.

Two New York rooftops are home to the largest rooftop soil farms in the world.

Incredible miniature towns and buildings created and decorated with thousands of tiny rocks.

A museum and doll store featuring a surreal and super sanitized version of where babies come from.

These ancient ritual mounds are our best window into the culture of the ancient Mississippians.

Bad farming practices caused this unnatural natural wonder.

A market for witches is hidden within a train station.

Neon signs that grace the windows of Bergdorf Goodman's and Tiffany & Co. come from this studio in Brooklyn.

A band of aerialists and circus performers putting on incredible shows in East Williamsburg.

Volunteer-run library dedicated to exploring five decades of activism history.

Leaf through over 30,000 artists' sketchbooks in what may be the world's largest collection of doodles

First a horse rendering plant, then a 19th century landfill, this beach is full of glass from thousands upon thousands of broken bottles.

This whimsical Oz-themed park had a wonderful impact on the surrounding neighborhood.

The only museum of sake in the United States is nestled in an unlikely California college town.

Handmade treasures from around the world.

Travelers exchange letters with woodland creatures at this mini post office.

A storybook European village in Berkeley.

From a neon Rapunzel to a bike traffic meter to a street fair color scheme, the most opened drawbridge in the US is a veritable art gallery.

This semi-secret garden in south Seattle emulates a traditional Japanese garden using the plants of the Pacific Northwest.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

There's a 12-foot-tall replica of the Washington Monument hidden under a manhole nearby.

Enormous lake at the bottom of a unique cave system.