This municipal playground was co-created by the father of one of the most playful characters ever.

One of the most elaborate displays of Jellyfish is on display at the aquarium.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

Quite simply the largest tree in the world (by volume).

A "gravitational anomaly" located in the redwood forests just outside of Santa Cruz, California.

San Francisco's newly reopened hands-on science museum.

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

Final resting place of Geronimo, Quanah Parker, and the first atomic gun ever fired.

Along the historic Mother Road is an old gas station with a secret counterfeiting past.

American bison herd descending directly from a Bronx Zoo breeding program that saved the species from extinction.

Modern technology and live displays tell the story of the Pacific during WWII for the Internet generation.

The end of times arrives, at least for the fish in the O.C. Fisher Reservoir.

A health museum containing a 27’’½-foot intestine.

An enormous pink granite batholith, long attributed with spiritual powers by the Tonkawa Indians.

A Texas cave network is home to some of the world's most spectacular-looking and bizarrely named mineral formations.

A gorgeous garden oasis with winding paths, stone bridges, and a troubling history.

Every year, the colorful murals of Montreal get a complete makeover.

A grand Gothic Revival basilica with stained glass depictions of Montreal's religious history has only one soul resting in its crypt.

This castle was once considered as an option for the Royal Family's alternate residence, but you may know it better from the 'X-Men' movie.

Designed by Buckminster Fuller, this relic of the 67 Expo survived fire and ice.

This natural Icelandic fissure allows divers to swim right between two volatile tectonic plates.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.