The remains of the dam that unleashed a 15-foot wall of water on Denver.

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

An unusual sand beach in the middle of a forest.

This unassuming stone commemorates a condiment factory gone up in smoke.

This small section of the Sleepy Hollow Cemetery is rotten with famous authors' graves.

This modernist island church incorporates the Finnish nature into its worship practices.

The macabre paintings created by famous suicide proponent Jack Kevorkian, or "Dr. Death."

An abandoned town is hidden in Great Smoky Mountains National Park.

This lighthouse was witness to the end of WWII hostilities and now collects creepy cairns.

A religious-themed park filled with folk art to bring biblical stories to life that fell into disrepair and now being restored.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

The oldest continuously inhabited street in America.

"A hideous albatross in the Hudson River Valley."

The only intersection in America where the buildings on all four corners were built pre-Revolutionary War.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

Medicinal spa created with the discharge from a geothermal energy plant.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

An old hill fort covered in over 100,000 crosses is a symbol of Lithuanian nationalism and beliefs.

3,000 market stands in five former Zeppelin hangars.

Flamboyant architecture from the turn of 20th century.

The mansion home of author Edith Wharton.

Resonating tubes make music from highway overpass.

Over fifty whirling pools left by the glacial age.

An old trolley bridge was converted into a breathtaking garden bursting with colorful flowers.