The rusting remains are visible sticking out of the waters of the Delaware Bay.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

A wall of chewing gum moonlights as collective art.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

The longest continuous underwater road in North America was built at the insistence of Franklin Roosevelt.

Where the embers of the Big Bang were first detected.

The creek where a shark wreaked terror upon New Jersey, and served as the inspiration for "Jaws."

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

Elevated freight railway turned wildly successful urban park.

A unusual sanctuary for abused and exotic animals in South Jersey.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

This former stomping grounds of the most eminent astronomers of the early 20th century.

Infamous marsh filled with toxic waste, World War II-era London rubble, and dead mobsters galore.

This massive boulder is either a unique rock formation created by glacial melt or a magic energy vortex.

Once close to extinction, there is no shortage of elephant seals on the beaches of Año Nuevo State Park.