One of only two commuter aerial tramways in the United States.

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

Elevated freight railway turned wildly successful urban park.

Try not to get slimed in Tribeca.

A crumbling hospital from the 1850s on Roosevelt Island.

Twelve plaster figures inspired by da Vinci's famed painting haunt the desert landscape above a real-life ghost town.

Nearly 300,000 acres of wildlife, natural splendor, and a hidden ghost town have been designated a national monument.

The drama of nature in full effect in this Nevada State Park.

A grandiose octagonal home crowned by a large dome stands out among the antebellum mansions.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

Erosion and various mineral deposits give this striking canyon its distinct color and soft appearance.

A tunnel with windows, so you don't miss out on the impressive views.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

Electrical pylon in the shape of Disney's beloved mouse.

Located within a historic park, the beacon is the oldest standing structure in Miami.

An 18th-century Spanish watchtower made entirely of seashell and concrete.

Arrr! The most authentic collection of pirate artifacts in the world... matey.

The headquarters of the Mahanikai school of Buddhism, Thailand's largest monastic order.

Buddha shrines hide within dark tunnels at this unique forest temple.

This sacred cave temple is home to thousands of bats and according to legend, a giant snake king.

The inky volcanic sand leads to reefs teeming with aquatic life waiting to be discovered by snorkelers and divers.

These mid-century motels once housed the workers who built the Glen Canyon Dam.

Dolphins, ancient clams and hundreds of waterfalls make this one of the world's top tourist destinations.

This preserved village shows the modest lifestyles of the area's 19th-century Chinese gold miners.