White Sands national monument, New Mexico

Between Roswell (aliens!) and Las Cruces (city of the crosses) may be a 275- square-mile space of pristine white crystal called White Sands. What you are seeing isn’t actual sand, however the world’s largest mineral sand dune field, encompassing you on all sides. it should feel as if you have left planet Earth: the superfine sand in your hands – and you’ll scoop handful once handful – trickles through your fingers like quicksilver. The $3 fee covers all of your activities within the park, from picnicking to sledding on the dunes to observation the sunset. For a further fee, fancy a full-moon bike ride or camp nightlong.