The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

The only natural lake in the world that drains into both the Atlantic and Pacific Oceans.

This Yellowstone geyser may not shoot as high as the nearby Old Faithful, but it erupts for considerably longer.

An architect's childhood fantasy treehouse made real.

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

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

A beautiful geyser under environmental threat.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

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

Three and a half miles of cliffs, rocky beaches, Gilded Age mansions and 40 Steps to nowhere in particular.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

This extravagant Art Nouveau rest stop features a million-dollar view of the Columbia River.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

One of the best places to see feral Colonial Spanish Mustangs in the United States.

American involvement in World War I officially ended in 1921 in New Jersey, three years late and thousands of miles from the battlefield.

Brightly colored 30-foot-tall totems light up the desert sky just outside Las Vegas.

The largest body of water in Massachusetts annihilated four small towns just to slake Boston's thirst.

The land is home to swimming ponies and a legendary 18th-century treasure.

Home to the deepest rift anywhere on Earth.

Take shelter from Hawai'i's tropical heat under the massive canopy of largest Banyan tree on the island.

Holding multiple historical boats and an entire 19th century village, this New England attraction is the largest maritime museum in the world.

The final resting place of American icon Buffalo Bill, and a museum that aids in telling his tale.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.