Unrepaired walls from a 1920 anarchist bomb attack.

This otherwise innocuous bodega was once the headquarters of the most feared assassin's guild in American history.

Home to the infamous "Typhoid Mary" and the worst loss of life in New York's history prior to September 11, 2001.

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

A very classy 1920s-era bar right in Grand Central Station.

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

Grand Cayman is home to a colorful sculpture garden filled with giant concrete animals.

The capital of the Cayman Islands is a center of offshore banking, but gets battered by blistering hurricanes.

Send a postcard while vacationing with Satan.

One of the last refuges of the endangered eastern lowland gorilla.

Home to pygmy hunter-gatherers, hundreds of animal and bird species, and the strange okapi, or forest giraffe.

The world's only facility where orphaned mountain gorillas are cared for.

Mount Nyiragongo has erupted at least 34 times since 1882 and is home to the world's largest lava lake.

The most biologically diverse protected area in Africa is also the most dangerous.

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

On the edge of grassland in northeastern Colorado, these rock formations are some of the few remnants of a high plain that has eroded away over millions of years.

Take a dip in the world's largest mineral hot springs pool.

Isak Heartstone, a 15-foot wooden troll made out of recycled materials.

A tiny nondenominational church harkens back to the days of the first homesteaders in the region.

This restored farmhouse is a time capsule of a 19th-century Colorado homestead.

This marker identifies the location where three states converge.

Each year, teams of the world's best snow sculptors have 65 hours to create frozen masterpieces.

A museum dedicated to the mysterious cryptid.

Two creeks flow out of either end of this canyon in opposite directions.