Prohibition sign, geothermal springs, geysers, Yellowstone National Park, Wyoming, United States of America, USA

allowed america american area areas ban bans caution cautionary conservation danger dangerous dangerously dangers day daylight daytime during exterior exteriors forbidden geothermal geysers icon icons national national natural nature nobody north not notice notices of outdoor park park parks photo photos pictogram pictograms preserve preserves prohibited prohibition prohibition prohibitions reserve reserves risk risks risky sanctuaries sanctuary shot shots sign signboard signboards signs springs states the united us us american usa venture ventures warn warning warnings warns wildlife wyoming yellowstone