One of many gator theme parks, abandoned in the sugar fields of South Florida.

These constructed wetlands naturally filter millions of gallons of treated wastewater every day.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

Belly up to the bar in Cowtown, don't forget to buy some boots.

A popular swimming hole that hides one of America's most deadly diving spots.

A grove of colossal man-made flowers built to collect the sun's rays.

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

Some islands... they come, they go, especially on Lake Travis.

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

Housed in a century-old building, this museum's dedicated not just to soft drinks, but to the free enterprise system.

A 24-hour vending machine restocked daily with homemade full-sized pecan pies.

Former villa and estate of James Deering developed to preserve native tropical forests.

The site of a tragic massacre that spawned a multimedia franchise.

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

A dilapidated dock tells the story of Titanic’s missed arrival.

Elevated freight railway turned wildly successful urban park.

An artist's cute bronze subway sculptures belie his violent artistic past.

I-95's Tijuana-style celebration of kitsch at the Carolina border.

Wine bottle sculpture with a ship's stateroom inside.

Red frames showcase remnants of one of New York's original subway stations.

The most confusing clock in New York.

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.

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

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.