A pedestrian walks past one of many intricate pieces of street art in Dublin, Ireland.
Giant sequoia's tower over tall trees throughout Sequoia National Park in southern California.
Boats docked at Embarcadero Marina in San Diego, California during sunset on Monday December 18, 2017.
A Galapagos shark swims off the coast of Haleiwa, Oahu
A man smokes on the deck of a ferry from Dublin, Ireland to Holyhead, Wales.
Elk gather in a meadow in Orick, California on Friday December 22, 2017.
Gondola drivers wait at a dock for their next customers in Venice, Italy; Sept. 2014.
A lightening storm over Venice, Italy.
Street performers dance to traditional Irish music in the Temple Bar area of Dublin, Ireland.
A street performer break-dances in London, England