Underwater art project will double as a massive artificial coral reef to help regenerate the damaged ecosystem.

One of Mexico's youngest major cities still holds on to this structure representing its short modern history.

A small collection of iguana-infested ruins hides amid Cancún's bustling hotel zone.

Few of the many visitors to this resort town know of its hidden Maya ruins.

One of Mexico's least-visited archaeological sites is tucked away inside a theme park.

A flooded Mexican cave that hides a river beneath the water.

A Lovecraftian altar of nightmarish bronze chairs sits ominously on a boardwalk in Puerto Vallarta.

A sculpture dedicated to the trade that gave the town its name.

Tucked along a river are enigmatic stone carvings created thousands of years ago.

A wild Hollywood resort thwarted by mosquitoes.

This historic Victorian hotel has a scandalous history of affairs and murder.

400 million-year old limestone caverns nestled in the Ozarks served as shelter and a hideout for cultures throughout North American history.

This historic hotel on Bathhouse Row in Hot Springs National Park has a storied history of gangsters and baseball greats.

Two gushing waterfalls of hot spring water within a block of each other.

A home designed to be on the cutting edge of comfortable, low-cost living.

A 35-foot-tall fork stuck in the ground outside an office building in Missouri.

An unexpected but incredible collection of wildlife dioramas spanning rainforests, swamps, forests, and plains.

The show pony of cave systems, Fantastic Caverns manages to live up to its name.

This museum features the original car used on the Beverly Hillbillies sitcom.

Where the author wrote her beloved "Little House" books.

European castle ruins in an American state park are actually the product of death and grief.

Away from the crowds of fishing enthusiasts, take a hike deep into the woods and journey into an eerie darkness.